The boom is divided into two books. The first book contains instructions for summoning a demon and for the construction of tools with which to force the demon to do one's bidding. The second book is divided further into two parts: the
Sanctum Regnum ("Holy Kingdom") and ''Secrets, de L'Art Magique du Grand Grimoire
("Secrets, of the magic art of the Grand Grimoire"). The Sanctum Regnum
contain instructions for making a pact with the demon, allowing one to command the spirit without the tools required by book one, but at greater risk. Secrets
contains simple spells and rituals one can employ after having performed the ritual of the first book. Some editions contain a short text between these two parts, Le Secret Magique, où le Grand Art de pouvoir parler aux Morts
(The Magic Secret, or the Grand Art of being able to speak with the dead''), dealing with necromancy. The book describes several demons as well as the rituals to summon them in order to make a pact with them. It also details several spells for winning a lottery, talking to spirits, being loved by a girl, making oneself invisible, etc.
List of demons This book mentions three greater demons. These demons are similarly prioritized in
Grimorium Verum. •
Lucifer, emperor •
Beelzebub, prince •
Astaroth, grand duke It also mentions six lesser demons: • Lucifuge Rofocale, prime minister •
Satanachia, commander in chief (in French, "commandant en chef") •
Agaliarept, commandant •
Fleurèty, lieutenant-general •
Sargatanas, brigadier-major •
Nebiros, marshal and inspector general ==In popular culture==