My all-time favorite book about the war is Paul Fussell's seminal
The Great War and Modern Memory.
Another really terrific book about the Great War,
Rites of Spring: The Great War and the Birth of the Modern Age is currently up for vote at the book club for discussion later this month.
https://www.mobileread.com/forums/sho...d.php?t=241936
The lit book club has just read Vera Brittain's devastating memoir,
The Testament of Youth. The discussion is ongoing, so there's plenty of time to catch up!
https://www.mobileread.com/forums/sho...d.php?t=240621