Two books well worth reading concerning the USS Indianapolis;
The first "In Harms Way", by Doug Stanton [mention much earlier in 'books read' section here.
The second "Suicide Submarine" by Yutaka Yokota, of the Japanese Navy / with Joseph D. Harrington
This is about the 'new' type submarine and the newest torpedo developed by the Japanese which devastated the Inndianapolis causing it to sink so fast. [think kamikaze]