As my hobby is WW2 research, in particular, the Battle of the Atlantic, I tend to read all I can on that subject and have collected many books, many still unread, on that. In particular Captain Frederic John Walker RN, Johnnie Walker. His story is online at:
WALKER RN
My site. I am also attempting, very slowly, to write a book on him.
I have already had one published, called "On A Sailors Grave (No Roses Grow)" about maritime disasters on WW2. They are mostly european but include the story of the USS Indianapolis. The common denominator being the amount of lives lost against size of ship.
Sadly for me, the publisher who graciously took it into print, only sells from his online store; thereby denying me the chances of greater sales!!
Good books = Walker RN - Terence Robertson; The Battle of the Narrow Seas - Peter Scott; Relentless Pursuit - DEG Wemyss; The Fighting Captain - Alan Burns; and other out of print WW2 books I found online and bought easily.