Book excerpt: The journey up Mount Everest is never easy. Climbers risk their lives as they struggle around jagged towers of ice, over snow-covered boulders, and across gaping crevasses. Pete Athans knows these dangers well. He has climbed Mount Everest fourteen times and reached the summit seven times. What is it like to climb the highest mountain on Earth? In this book, you'll follow Pete to the top—and learn about his adventures along the way.