K-19 The Widowmaker
The Secret Story of The Soviet Nuclear Submarine by Peter Huchthausen, Capt. USN (Ret.)
This book, while touching a bit on the film that graces the cover, is much more a historical look not only into the setting of the film, but also the overall history of the Soviet submarine force and its disasters, as well as the environmental legacy that it's leaving behind.
The characters of the film do not correspond directly to any real people, which is explained in Katheryn Bigelow's afterword. But, despite Hollywood's taint, the book in an excellent read by the retired captain. If you're interested in hearing about the history of the Cold War under the seas from the other side, including some of Captain Zatayev's own personal journals, I recommend it.