Start with high-confidence sociolinguistics books, then narrow by subgenre or adjacent topics.
What Every BODY Is Saying
Joe Navarro, Marvin Karlins
Mother Tongue
Beth Hicks, Jenni Nuttall
Fluent Forever
Gabriel Wyner
Words From Hell
Jess Zafarris
English As a Lingua Franca Among Adolescents
Katharina Beuter
Proto
Laura Spinney
