Books I love on topics I don’t care about

I have a new nomination:

[Alice] Sheldon (1915-87) was the most important sf writer ever to live in the
Washington area.  She also was, in her varied career, a psychologist, a
CIA officer and a chicken farmer.  Her biographer, Julie Phillips,
combines diligent archival work with more than 40 interviews to
successfully portray one of sf’s most brilliant — and tortured —
authors.

That is from a review of James Tiptree, Jr.: The Double Life of Alice Sheldon, by Julie Phillips.

Do, in the comments, give us your nominations for this category, but please make sure you don’t have any intrinsic interest in the topic of the book.