Encyclopedia Cthulhiana: A Guide to Lovecraftian Horror

You just found out that you've inherited a copy of Reverend Winter-Hall's translation of the Sussex Manuscript. (What is it? Is it dangerous?) At night in your dreams you hear people chanting, "Ph'nglui mglw'nafh Cthulhu R'lyeh wgah'nagl fhtagn," over and over again. (What does it mean?) You desperately need to know what the Pnakotic Pentagon looks like. And where Olaus Wormius was born. And how to find the Laniqua Lua'huan. Not to mention the Twin Obscenities, the Wailing Writher, and the Tikkoun Elixir. Who you gonna call? Encyclopedia Cthulhiana. Or rather, to give its proper and full title, Encyclopedia Cthulhiana, Being an Investigation into the Myth-Patterns of the Xothic and Commorium Legend-Cycles with Notes on the Alhazredic Demonology, or, A Compendium of Lore Relating to Those Beings Who Once Ruled the Universe and Those Who Have Revered and Renounced Them, As Expressed Through the Mythology of All Cultures and Explained in the Works of H.P. Lovecraft and Others in a Manner Thought to Be Fictional by the Uninitiated and Rational.