Invisible frontier

This is truly armchair escapism. As one ages and successfully takes on the image of a responsible adult, what has been left behind is the freedom of adventure, the excitement of possible discoveries, and the accomplishments of being part of the team.

Why read this book? Because it's a glimpse into a world we don't see as we walk the sanitized city streets.

What a breathtaking story of real-life adventurers in the world's greatest city. I loved the way the authors combined personal stories with historical facts.