noun
self-study book; self-study manual; crib
A book designed for independent learning, often with exercises and answers. 'Crib' can imply a book used for quick reference or cheating, but in Japanese it simply means a self-study aid.
この自習書を使えば、一人で日本語を勉強できます。
With this self-study book, you can study Japanese on your own.
試験前に自習書で復習した。
I reviewed using a self-study manual before the exam.
問題集 is a collection of practice problems, whereas 自習書 may include explanations and lessons in addition to exercises.
Compound of 自習 (self-study) and 書 (book).