Ah, the hero's journey. It's an epic structure of leaving home, making friends, facing challenges, slaying monsters and coming back with the elixir of wisdom. The prospect of a journey and choices of where to go and how to get there still tantalizes travelers. Thank goodness for these guides. Whether they've been advising on low-impact travel, documenting life in remote corners of the globe, or musing on the spiritual gifts of travel, these writers have dedicated their work to connecting people to the world.