The Simon Necronomicon is a grimoire written by an unknown author, with an introduction by a man identified only as 'Simon'. Materials presented in the book are a blend of ancient Middle Eastern mythological elements, with allusions to the writings of H. P. Lovecraft and Aleister Crowley, woven together with a story about a man known as the 'Mad Arab'. Much of the book is a collection of magic rituals and conjurations, with many incantations and seals being described. Most of these are intended to ward off evil or to invoke the Elder Gods to one's aid. Some of them are curses to be used against one's enemies. The incantations are written in a mixture of English and more ancient languages, with a few possible misspellings in the romanization of the archaic words. There are also several words that do not appear to be from any known language. The many magical seals in the book pertain to particular gods and demons, and are used when invoking or summoning the entity with which each is associated. In some cases there are specific instructions on how to inscribe the seals and amulets, including the materials that should be used and the time of day for their creation; in other cases, only the seal itself is given.