Fictional book
book that only exists within a work of fiction
R'lyeh Text
The Theory and Practice of Oligarchical Collectivism
Heavenly Demonic Strategy
Junior Woodchucks' Guidebook and Reservoir of Inexhaustible Knowledge
The Hitchhiker's Guide to the Galaxy
Book of Shadows
A Treatise on the Binomial Theorem
Encyclopedia Galactica
Orange Catholic Bible
The Dynamics of an Asteroid
Octavo
Book of Life