The Bicycle Diaries: My 21000-Mile Ride for the Climate is written by David Kroodsma, who is a climate researcher d environmental consultant. He traveled 21000 miles on his Bicycle to create awareness on the climate change. Below you can read just a small paragraph from the book.
I stopped pedaling and looked anxiously at the frontier. In front of me was the California-Mexico border, marked by a white tollbooth-like structure and a large sign that read Mexico in metal letters beneath the country’s coat of arms: a large eagle perched on a cactus with a snake in its talons. It was an hour after sunrise on a Sunday in early December, and the light angled through the cool desert air, illuminating the quiet, dusty town of Tecate just beyond the tollbooth
He traveled from California to the tip of the South America. you can see the route map below.
It took almost 2 years for him to complete this.
This book raised the fund for publication via kickstarter.com where 256 people helped him to raise $12722 to publish it.
His experiences are covered in this book, which a good personal travel-log you can read. The Kindle edition of this book is $5.07 normally but for a few days you can get this for free. So go ahead and grab one now itself. Here is the link to The Bicycle Diaries: My 21,000-Mile Ride for the Climate [Kindle Edition]