Start with high-confidence personality disorders books, then narrow by subgenre or adjacent topics.
Search for the Real Self
James F. Masterson
Why Does He Do That?
Lundy Bancroft
Psychopath Free
Jackson MacKenzie
I Hate You--don't Leave Me: Third Edition
Jerold J. Kreisman, Hal Straus
When Loving Him Is Hurting You
David Hawkins
The Sociopath Next Door
Martha Stout
DBT for Dummies
Gillian Galen, Blaise Aguirre
The Psychopath Test
Jon Ronson
Stop Walking on Eggshells for Partners
Randi Kreger, Bill Eddy LCSW JD
Adult Daughters of Narcissistic Mothers
Stephanie M. Kriesberg PsyD, Wendy T. Behary LCSW
The Borderline Personality Disorder Workbook
Daniel J. Fox PhD, Daniel J. Fox
Children of the Self-absorbed
Nina W Brown EdD LPC, Nina W. Brown
The Dialectical Behavior Therapy Skills Workbook
Matthew McKay PhD, Jeffrey C. Wood PsyD
Splitting
Bill Eddy, Randi Kreger
You Can Thrive After Narcissistic Abuse
Melanie Tonia Evans
Sorry My Mental Illness Isn't Sexy Enough for You
Kay Garbett, Katja Pavlovna