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The Explorers Club Presents: Letters from the Edge

Stories of Curiosity, Bravery, and Discovery

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Hardcover
$32.00 US
6.39"W x 9.54"H x 1.06"D   | 18 oz | 12 per carton
On sale Oct 28, 2025 | 320 Pages | 9780593240038

An exhilarating collection of letters and stories from the world-renowned Explorers Club, featuring firsthand accounts of crossing boundaries and making history over the past century

For centuries, explorers from all over the globe have traveled the far reaches of what the world has to offer, helping us expand the map, learn about other cultures, and move the needle of human knowledge. But an explorer’s work isn’t finished when they reach a new destination or make a discovery; they need to somehow tell the tale.

Letters from the Edge compiles letters, email exchanges, field journals, and more from explorers who have joined the esteemed and longstanding organization The Explorers Club. As they undertook their journeys, sometimes with their lives at risk, they penned their dispatches from afar, sharing their thoughts on enduring lava-spewing volcanos in Australia; suffering starvation and isolation in the harsh tundra of the Arctic; rescuing trapped kids in hazardous caves in Thailand; plunging into the depths of the North Atlantic Ocean to excavate the history of the Titanic; communicating with the other side of the galaxy; and so much more—all to quench the insatiable curiosity of humanity. And still, humanity strives to discover more.

Using source materials and interviews with the explorers, Letters from the Edge helps us understand the edge of our knowledge, culture, and universe, and inspires us to navigate the edges in our lives.
© Dirty Sugar Photography
Jeff Wilser is the author of six books, including Alexander Hamilton’s Guide to Life and The Good News About What’s Bad for You . . . and The Bad News About What’s Good for You. His work has appeared in print or online at GQ, Esquire, Time, New York magazine, Glamour, Cosmo, mental_floss, MTV, and the HuffPost. His advice has been syndicated to a network of two hundred newspapers including the Miami Herald and the Chicago Tribune. He grew up in Texas, used to live in New York, and is now traveling the world indefinitely. View titles by Jeff Wilser
Introduction

For Neil Armstrong, going to the edge meant walking on the moon. For Jane Goodall, the edge meant studying chimps in Tanzania. For Edmund Hillary and Tenzing Norgay, it meant summiting Everest. For Amelia Earhart, it meant circumnavigating the globe.

So, what is “the edge”?

Andrés Ruzo thought he knew the answer. A geothermal scientist, Ruzo trekked through the Amazon to chase down the legend of a “boiling river” that once haunted conquistadors. The river was not on any maps, and many believed it to be a myth. When Ruzo discovered this river that boiled—emitting vapors that glowed in the moonlight—he stood at what he thought was the edge. But now those words meant something else entirely. “The world is bigger, more incredible, and more mind-blowing than I could ever have imagined,” says Ruzo. “Awe lies at the edge—the edge is where you find God.”

If you ask one hundred explorers to define the edge, you’ll get one hundred different answers. This is not an exaggeration, and this is not theoretical. While preparing this book, we asked members of The Explorers Club—the home to the world’s greatest explorers since 1904—to share their own meaning of the edge.

Over 140 explorers responded. For one mountaineer, the edge means “not knowing if you will live to see tomorrow.” Others view it as an internal challenge. “Pushing my limits taught me resilience,” says Meg Haywood Sullivan. “Growth occurs when challenging the boundaries of emotional security, physical comfort, and the status quo.”

The edge can refer to the edge of a cliff, the edge of consciousness, the edge of the known world. But almost every edge has one thing in common. “The edge means risk,” says Will Roseman, the Club’s longtime executive director. And it’s the explorer’s job to calculate and manage and minimize risk, weighing the pros and cons of climbing that next ridge. Sometimes the plan goes sideways. And when it does, says Roseman, “It takes all their wits and all their efforts to save themselves from falling off that edge.”

We’re fascinated by the edge, in part, because it strips away the quotidian aspects of “normal” life, highlighting the most dramatic aspects of exploration. “The edge is the place, one step past what you think you can endure, where humanity is distilled into its strongest stuff,” says Donna Oliver, who, in 1975, became the first woman to solo-winter in the Antarctic Circle.

This book shares excerpts from letters showcasing this “strongest stuff,” as well as their accompanying stories. Many of these are gripping tales of adventure, yes, but they’re also something more, something deeper, something universal. By seeing how world-class explorers operate at the edge, we can gain insights, instruction, and inspiration for how we can navigate the edges in our own lives.

For all of us have our own version of the edge. “The edge, to me, is that invisible, theoretical, metaphorical boundary that defines your comfort zone,” says lifelong hiker J. R. Harris. “Some people like to stay at its center, where life is more stable and comfortably consistent. Others, like me, like to explore the periphery, where life is less predictable but more exciting.”

This book also explores what it’s really like to navigate the edge— with the spotlight on actual flesh-and-blood human beings, not exalted heroes. (Even if these humans are in many ways heroic.) So we’ll get into the grime and the weeds and the muck. “The edge is not always full of glory, like some people may think,” says Jessica Glass, whose letters from the edge include salty details like “New PhD low: fishing in the Seychelles Islands on a researcher’s budget, casting under a bridge at 5:30 a.m. with no luck, as you stand under a sewage pipe that periodically reeks of shit and—best part—sprays sewer water on you.”

And that brings us to the letters themselves. For millennia, explorers have wandered from their homes and then sent dispatches from afar. These letters have helped us move the needle of human knowledge. Charles Darwin could not write On the Origin of Species, for example, without first traveling to Patagonia, exploring its ecosystem, and then scribbling his thoughts in a series of letters. An explorer’s work isn’t finished when she reaches a new destination or makes a discovery; she needs to somehow share what she’s learned.

From the Silk Road to rovers on Mars, letters have always told the tale. But they do more than that. Letters give us comfort in the knowledge that the explorer is alive and safe—or warn us when they are not. Letters can be intimate. They provide the benefit of immediacy, giving unfiltered insight into what the explorer was feeling in the moment, whether excitement or fear or despair or wonder. They allow us to clearly hear the voice of the explorer, sometimes in triumph and sometimes from the grave.

For millennia, letters from the edge were exactly what they sound like: handwritten notes on sheets of paper. Technology changed, but the concept endured. So we’ll widen the scope of “letters” to include all the ways that explorers have captured their thoughts and shared them with the world: email, text messages, field journals, blog posts, ham radio, tweets, scientific studies, fax, telegrams, drawings, data packets from space, and holograms intended to reach the far side of the galaxy.

Yet, in one final sense, the letters are not really about the far side of the galaxy or even the edge. They have a secret dual purpose. When explorers go to the edge, they’re on a quest to learn something. That could be discovering the South Pole, researching climate change, studying other cultures, or rocketing through space. They share what they’ve discovered, and the world is enriched by that knowledge. Even probes to distant corners of the universe, ultimately, help us better understand Earth’s place in the cosmos. For astrophysicist Gregory Matloff, the edge means that “The universe is huge, and we are tiny. We can’t conquer it, but we can explore it.”

Going to the edge, paradoxically, is a way to gain perspective at the center. Understanding the edge is a way to understand ourselves.

About

An exhilarating collection of letters and stories from the world-renowned Explorers Club, featuring firsthand accounts of crossing boundaries and making history over the past century

For centuries, explorers from all over the globe have traveled the far reaches of what the world has to offer, helping us expand the map, learn about other cultures, and move the needle of human knowledge. But an explorer’s work isn’t finished when they reach a new destination or make a discovery; they need to somehow tell the tale.

Letters from the Edge compiles letters, email exchanges, field journals, and more from explorers who have joined the esteemed and longstanding organization The Explorers Club. As they undertook their journeys, sometimes with their lives at risk, they penned their dispatches from afar, sharing their thoughts on enduring lava-spewing volcanos in Australia; suffering starvation and isolation in the harsh tundra of the Arctic; rescuing trapped kids in hazardous caves in Thailand; plunging into the depths of the North Atlantic Ocean to excavate the history of the Titanic; communicating with the other side of the galaxy; and so much more—all to quench the insatiable curiosity of humanity. And still, humanity strives to discover more.

Using source materials and interviews with the explorers, Letters from the Edge helps us understand the edge of our knowledge, culture, and universe, and inspires us to navigate the edges in our lives.

Author

© Dirty Sugar Photography
Jeff Wilser is the author of six books, including Alexander Hamilton’s Guide to Life and The Good News About What’s Bad for You . . . and The Bad News About What’s Good for You. His work has appeared in print or online at GQ, Esquire, Time, New York magazine, Glamour, Cosmo, mental_floss, MTV, and the HuffPost. His advice has been syndicated to a network of two hundred newspapers including the Miami Herald and the Chicago Tribune. He grew up in Texas, used to live in New York, and is now traveling the world indefinitely. View titles by Jeff Wilser

Excerpt

Introduction

For Neil Armstrong, going to the edge meant walking on the moon. For Jane Goodall, the edge meant studying chimps in Tanzania. For Edmund Hillary and Tenzing Norgay, it meant summiting Everest. For Amelia Earhart, it meant circumnavigating the globe.

So, what is “the edge”?

Andrés Ruzo thought he knew the answer. A geothermal scientist, Ruzo trekked through the Amazon to chase down the legend of a “boiling river” that once haunted conquistadors. The river was not on any maps, and many believed it to be a myth. When Ruzo discovered this river that boiled—emitting vapors that glowed in the moonlight—he stood at what he thought was the edge. But now those words meant something else entirely. “The world is bigger, more incredible, and more mind-blowing than I could ever have imagined,” says Ruzo. “Awe lies at the edge—the edge is where you find God.”

If you ask one hundred explorers to define the edge, you’ll get one hundred different answers. This is not an exaggeration, and this is not theoretical. While preparing this book, we asked members of The Explorers Club—the home to the world’s greatest explorers since 1904—to share their own meaning of the edge.

Over 140 explorers responded. For one mountaineer, the edge means “not knowing if you will live to see tomorrow.” Others view it as an internal challenge. “Pushing my limits taught me resilience,” says Meg Haywood Sullivan. “Growth occurs when challenging the boundaries of emotional security, physical comfort, and the status quo.”

The edge can refer to the edge of a cliff, the edge of consciousness, the edge of the known world. But almost every edge has one thing in common. “The edge means risk,” says Will Roseman, the Club’s longtime executive director. And it’s the explorer’s job to calculate and manage and minimize risk, weighing the pros and cons of climbing that next ridge. Sometimes the plan goes sideways. And when it does, says Roseman, “It takes all their wits and all their efforts to save themselves from falling off that edge.”

We’re fascinated by the edge, in part, because it strips away the quotidian aspects of “normal” life, highlighting the most dramatic aspects of exploration. “The edge is the place, one step past what you think you can endure, where humanity is distilled into its strongest stuff,” says Donna Oliver, who, in 1975, became the first woman to solo-winter in the Antarctic Circle.

This book shares excerpts from letters showcasing this “strongest stuff,” as well as their accompanying stories. Many of these are gripping tales of adventure, yes, but they’re also something more, something deeper, something universal. By seeing how world-class explorers operate at the edge, we can gain insights, instruction, and inspiration for how we can navigate the edges in our own lives.

For all of us have our own version of the edge. “The edge, to me, is that invisible, theoretical, metaphorical boundary that defines your comfort zone,” says lifelong hiker J. R. Harris. “Some people like to stay at its center, where life is more stable and comfortably consistent. Others, like me, like to explore the periphery, where life is less predictable but more exciting.”

This book also explores what it’s really like to navigate the edge— with the spotlight on actual flesh-and-blood human beings, not exalted heroes. (Even if these humans are in many ways heroic.) So we’ll get into the grime and the weeds and the muck. “The edge is not always full of glory, like some people may think,” says Jessica Glass, whose letters from the edge include salty details like “New PhD low: fishing in the Seychelles Islands on a researcher’s budget, casting under a bridge at 5:30 a.m. with no luck, as you stand under a sewage pipe that periodically reeks of shit and—best part—sprays sewer water on you.”

And that brings us to the letters themselves. For millennia, explorers have wandered from their homes and then sent dispatches from afar. These letters have helped us move the needle of human knowledge. Charles Darwin could not write On the Origin of Species, for example, without first traveling to Patagonia, exploring its ecosystem, and then scribbling his thoughts in a series of letters. An explorer’s work isn’t finished when she reaches a new destination or makes a discovery; she needs to somehow share what she’s learned.

From the Silk Road to rovers on Mars, letters have always told the tale. But they do more than that. Letters give us comfort in the knowledge that the explorer is alive and safe—or warn us when they are not. Letters can be intimate. They provide the benefit of immediacy, giving unfiltered insight into what the explorer was feeling in the moment, whether excitement or fear or despair or wonder. They allow us to clearly hear the voice of the explorer, sometimes in triumph and sometimes from the grave.

For millennia, letters from the edge were exactly what they sound like: handwritten notes on sheets of paper. Technology changed, but the concept endured. So we’ll widen the scope of “letters” to include all the ways that explorers have captured their thoughts and shared them with the world: email, text messages, field journals, blog posts, ham radio, tweets, scientific studies, fax, telegrams, drawings, data packets from space, and holograms intended to reach the far side of the galaxy.

Yet, in one final sense, the letters are not really about the far side of the galaxy or even the edge. They have a secret dual purpose. When explorers go to the edge, they’re on a quest to learn something. That could be discovering the South Pole, researching climate change, studying other cultures, or rocketing through space. They share what they’ve discovered, and the world is enriched by that knowledge. Even probes to distant corners of the universe, ultimately, help us better understand Earth’s place in the cosmos. For astrophysicist Gregory Matloff, the edge means that “The universe is huge, and we are tiny. We can’t conquer it, but we can explore it.”

Going to the edge, paradoxically, is a way to gain perspective at the center. Understanding the edge is a way to understand ourselves.