- Wreck diving
- Submarines (U boats)
- Historical research
It is the story of an incredible, brave struggle by two US divers over 6 years to identify a newly discovered U boat wreck lying at 230 feet in the approaches to New York. (You may also have seen the documentary by them.)
It is well written and very well researched. I am not going to tell you any plot because it is a real "page turner". DO NOT READ THE END PAGES FIRST!
I see that Abe Books have copies.