Here's the new monthly freebie from University of Chicago Press:
Marine scientist Ellen Prager relates stories from her fellow field scientists in
Chasing Science at Sea: Racing Hurricanes, Stalking Sharks, and Living Undersea with Ocean Experts. The book is filled with firsthand accounts of the challenges and triumphs of dealing with the extreme forces of nature and the unpredictable world of the ocean.
http://www.press.uchicago.edu/books/freeEbook.html