Start with high-confidence submarines books, then narrow by subgenre or adjacent topics.
Red Star Rogue
Kenneth Sewell, Clint Richmond
The World Encyclopedia of Submarines
John Parker, Francis Crosby
Submarine Aircraft Carriers
Jacob Gunnarson, Norman Polmar
U-boat Vs Royal Navy Capital Ship
Mark Lardas, Edouard A. Groult
Royal Navy Monitors of World War II
Angus Konstam, Adam Tooby
Submarine Diary
Corwin Mendenhall, Corwin Mendenhall USN (Ret.)
U.s. Submarines Since 1945, Revised Edition
Norman Friedman PhD., Jim Christley
Submarines of World War II
E V Martindale
Submarines
David Ross
