also: コピーほん
noun
photocopy book; staplebound book
A book produced by photocopying and staple-binding, often used for small-scale self-publishing or fan works.
サークルでコピー本を作ってイベントで配った。
We made a photocopy book in our circle and distributed it at the event.
noun
self-printed dōjinshi
Colloquial term for a self-published fanzine or dōjinshi, typically produced via photocopying and staple-binding. Often used in otaku and fan communities.
See also: 同人誌
彼女は初めてのコピー本をコミケで売った。
She sold her first self-printed dōjinshi at Comiket.
同人誌 is a broader term for self-published magazines or books, while コピー本 specifically refers to those made by photocopying and staple-binding, often implying a smaller scale or amateur production.
Compound of コピー (copy) and 本 (book). The reading ぼん is a common rendaku form of ほん when combined with another word.