Wiktionary
copybooks
n. (plural of copybook English)
Wikipedia
Copybooks
A dÅjinshi copybook or copybon is a self-published and self-made work of fans or original fiction published using a copy machine.
Usage examples of "copybooks".
He found two card indexes, a half-dozen school copybooks, some used, a small cassette-recorder you could shove in your pocket.
A young man of inaction, who tried to murder his father by means of long poems in school copybooks and referred to his mother as the cook.