I started reading this account of the finding and identification of the U-869, a WW2 U-boat, last Friday evening and finished it Saturday afternoon. As others have said, I just couldnt put it down. It is, in some respects, an all-American tale, that of three heros on a shoestring budget who made an important exploration discovery. It reminded me of Thor Heyerdahl and the Kon Tiki trip in 1947.
The story itself is well-known. A bump on a bottom finder tracing, many difficult and dangerous dives, broken marriages, and four deaths. I was most interested in the personalities of the three men primarily involved; John Chatterton, Richie Kohler, and Bill Nagle. I have seen Chatterton and Kohler on television; after reading this book, I have a better understanding of these two men and what makes them go. Nagle was a surprise; his role in the exploration was larger than the media and the TV shows let on. This book presented his life and death in an honest and fair manner. The same is true for the other divers who died.
The writing style was quite good. Details were checked for accuracy as explained in the Note on Sources. The author, Robert Knudson, is guilty of perhaps overwriting. The story is itself exciting enough without over embellishment. I have one question about fact though. According to my understanding of chemistry, a mixture of helium, nitrogen, and oxygen is not flammable, as the author states on page 196. However, I am not a tri-mix diver and do not know. I once made a wreck dive off the New Jersey shore in a similar manner as Kohlers first one (page 132) and reading about it brought back very vivid memories.
Overall, I enjoyed the book and recommend it to anyone who wants a real-life thriller and history book in one package. Divers will appreciate the work and worry that went into the undertaking, and non-divers too will enjoy it for the story. Well done!