Found manuscript
A found manuscript (also, discovered manuscript, imaginary manuscript, pseudobiblia) refers to a literary trope in which a work of literature makes a reference to another work, claimed to exist but in fact being fictitious, and which usually is an important plot element; or claims to be such a work; or claims to be based on it. == History == According to L. Sprague de Camp, the earliest known example of a fictional book would be the Book of Thoth, an alleged holy or magical text from the era of Ancient Egypt, mentioned in a tale from that period ("Setne Khamwas and Si-Osire").