also: どくほん
noun
reader; reading book; guidebook; manual
A book designed for learning or guided reading, such as a graded reader, introductory guide, or instructional manual. Often used in titles like 〜読本.
See also: 入門書
このシリーズは初心者向けの読本として人気がある。
This series is popular as a reader for beginners.
日本酒の読本を買って勉強している。
I bought a guidebook on sake and am studying it.
noun
textbook (historical, esp. pre-war Japanese language textbook)
Specifically refers to pre-war elementary school Japanese language textbooks. In modern contexts, this historical sense is usually clarified or used in discussions of education history.
戦前の国語読本には、今では使われない表現が多く出てくる。
Pre-war Japanese language readers contain many expressions that are no longer used today.