Start with high-confidence beer books, then narrow by subgenre or adjacent topics.
The United States of Beer
Dane Huckelbridge
Beer, Sociability, and Masculinity in South Africa
Anne Kelk Mager
Pint-sized Ireland
Evan McHugh
The Craft Beer Revolution
Steve Hindy
The Meaning of Beer
Jonny Garrett
The Book of Hops
Dan DiSorbo