James Nestor books

Deep: Freediving, Renegade Science, and What the Ocean Tells Us about Ourselves (2014)

Wow. The author wrote an article about competitive freediving (diving to depths of up to 300 feet with no gear--just holding one's breath) for an outdoor magazine, then learned to freedive so that he could accompany researchers to swim with sharks and whales. He also went down to the ocean floo...