The Red Dragon however bears the title "Grand Grimoire" on its own. Multiple editions of it exist, some with material tacked on. It takes the form of a long ritualistic ceremony designed to secure communication with a demon known as "Lucifuge Rofocale" followed by various invocations and incantations and spells.
The contents are heretical in the extreme, from rituals involving boiling a black cat to the use of toxic substances in ritual form. Small wonder, that this text has gained so much notoreity.