Spell Book

Spell Books (書籍スペル, Shoseki superu) is a magical object that possesses intense knowledge and wisdom of the magical arts, and arcane magics. There are many types of spell books found in the dimensions, and some with magic energy in it.

Grimoire
The Grimoire is a special type of spell book that has either intense knowledge on arcane wisdom, and magical properties, and have the most powerful of spells and magics. Also having forbidden knowledge on the Omniverse that could kill anyone reading it.

Demon Book
The Demon Book is a collection of demonic books created by the Devil Kings and Satans of Hell. It holds the most dangerous of demonic spells and magic.