A book of games, especially one with an interactive story which unfolds as the reader makes decisions and follows links between numbered pages.(noun)
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Use "gamebook" in a sentence
"But as for this as a gamebook, which is probably what others would be curious about, I have to say it's an odd book."
"Of late I’ve been exploring and trying to fetter out online what in 80s parlance would be called a gamebook: a novel with choose-your-own-adventure CYOA plot branching but also with more of an RPG element as well–usually with a character with attributes and chanced to impact the story through combat and chance."
"I felt like the second edition overcomplicated things and decided the book should read more like a dictionary than a gamebook."