The crossword solution for the term 'HELP (BOOK CATEGORY)' is 'SELF'. SELF-HELP books are a genre of literature that provide advice and guidance on topics such as mental health, relationships, physical health, and personal finance. They are designed to HELP readers improve their lives and become more successful. SELF-HELP books are often written by experts in the field and can be used as a supplement to professional counseling or therapy.