Since the search function is kind of a pain if you're looking for biography recommendations:
The Quiet Warrior, by Thomas Buell (Spruance). Older, but a classic and nothing else really for Spruance
2 recent Nimitz bios: Nimitz at War, by Craig Symonds and Mastering the art of Command, by Trent Hone. Symonds unsurprisingly a little more traditional, both excellent on their own way