I found this book while sailing in the Bahamas, in a shack literally over a spot where we swam with sharks surrounding us. This book stole my attention even in that setting! All the things I love: special forces ex pat in the Caribbean, scuba diving, treasure & intrigue. Think James Reese from Terminal List, or Reacher, in the Caribbean.
I'd love to see a Paul Walker type make this movie, maybe even Ryan Gosling, put him in a more mature action role.