With Herma-Mora's summoning day in two days, I thought it only right to read a non fiction book. So, I'd like to know, what is your fav. non-fiction book?

I read a book while in the Army (late 80's) that was about the Beatles. I think the name was All You Needed Was Love: The Beatles After the Beatles by John Blake. I did find an entry for this book on https://www.goodreads.com/book/show/907418.All_You_Needed_Was_Love?from_search=true&search_version=service, but could not say if this is the book I read. It sounds like I remember, though

I am a fan of the Beatles and found this book a fun read.

Plutarch's Lives.

Shattered Sword, The Battle of Midway. I'm not near my book at the moment and cannot remember the name of the author.