The Book of Dagon was translated by Obed Marsh from R'lyeh glyphs with the assistance of Kanak tribal chieftain and deep one worshipper Walakea. It describes the relationship between Great Cthulhu and his servitor deep ones.
After Obed's death in 1878, the hand-written translation was taken by bribed servants to a young Ephraim Waite. Ephraim's father was a devout Methodist, however, and seized the book. When he passed, he gave the volume to Ephraim's younger brother Thomas for safekeeping.
Game statistics for the Book of Dagon appear in Escape from Innsmouth.
Published by arrangement with the Delta Green Partnership. The intellectual property known as Delta Green is ™ and © the Delta Green Partnership, who has licensed its use here. The contents of this document are ©Raymond H. Rich, excepting those elements that are components of the Delta Green intellectual property and those attributed to the sources listed above.