self-improvement book; self-help book
Refers to books aimed at personal development, often covering topics like success, habits, or mindset.
Lately I've been reading self-improvement books to boost my motivation.
This self-help book explains goal-setting methods in an easy-to-understand way.
自己啓発 is the broader concept of self-improvement or personal development, while 自己啓発書 specifically refers to a book on that topic.
Compound of 自己 (self), 啓発 (enlightenment, development), and 書 (book). The term follows a standard Sino-Japanese word formation pattern.