The Imagined Library Books that were never written

A world

The Cthulhu Mythos

Imagined by Clark Ashton Smith , H. P. Lovecraft , Robert Bloch , Robert E. Howard , H. P. Lovecraft and Hazel Heald .

5 volumes

The Book of Eibon Quoted
Eibon of Mhu Thulan — The Cthulhu Mythos · Clark Ashton Smith

A Hyperborean grimoire that has come down, Smith says, through a series of manifold translations from a prehistoric original written in a lost language — the Necronomicon's older cousin, from the other end of the correspondence.
De Vermis Mysteriis Quoted
Ludvig Prinn — The Cthulhu Mythos · Robert Bloch

A Latin grimoire written in prison by a Flemish sorcerer who claimed to have survived the Ninth Crusade, and printed in Cologne the year after they burned him.
Necronomicon Quoted
Abdul Alhazred, the mad poet of Sanaá — The Cthulhu Mythos · H. P. Lovecraft

The most famous book that does not exist. A grimoire of pre-human history and summoning rites, surviving in a handful of guarded copies, quoted just often enough to convince generations of readers it was real.
Pnakotic Manuscripts Quoted
The Great Race of Yith, and later hands — The Cthulhu Mythos · H. P. Lovecraft

Lovecraft's first invented book, older than the species that later tries to read it — fragments from a library-city that was not built by men.
Unaussprechlichen Kulten Quoted
Friedrich Wilhelm von Junzt — The Cthulhu Mythos · Robert E. Howard

A German study of surviving secret cults, printed in Düsseldorf in 1839. Its author was strangled six months later in a locked room, and the manuscript of his second book was torn to shreds.