Start with high-confidence divorce & separation law books, then narrow by subgenre or adjacent topics.
Collaborative Divorce
Pauline H. Tesler, Peggy Thompson
Winning Custody
Deedra Hunter, M.S., L.M.H.C, Tom Monte
Fair Share Divorce for Women, Second Edition
Kathleen A. Miller
The Ties That Bind (routledge Revivals)
Carol Smart
The Great Divorce
Ilyon Woo, Suzanne Toren
Divorce After 50
Janice Green
What Your Divorce Lawyer May Not Tell You
Margery Rubin
Tug of War
Harvey Brownstone
Family Divided
Robert Mendelson
Splitting
Bill Eddy, Randi Kreger