"The Greatest Air Battle: Dieppe, 19th August 1942," by Franks.
Swareiam gave it to me as a gift! Thanks, Swareiam!

It is awesome. Superbly detailed, and about an air battle that I previously did not know much about.
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Other than WWII books, have recently read (or am reading):
Bad Blood: Secrets and Lies in a Silicon Valley Startup, by Carryrou (Story of Theranos. Very interesting, and gives good account of how some scammy parts of Silicon Valley work.)
The Postmortal, by Magary. (SF-ish book. I don't like this one much.)
The Hike, by Magary. (Fantasy-ish book. I liked it. Not awesome, but I liked it.)
Overtime: Jim Harbaugh and the Michigan Wolverines at the Crossroads of College Football, by Bacon. (I loved it! Very interesting details behind a college football program. Well, to me, anyway -- a college football fan.)