Akumayōnachosaku (悪魔のような著作 "Pandemic Writings"; English Translation, "Pandemic Tales") An ancient relic from time immemorial, this book possesses arguably one of the world's largest collections of Magic to ever exist. Having existed for eons, it has had thousands of owners each contributing to it's literary composition, and as such it possesses an innumerable amount of sinister techniques and information. Each owner imprints a portion of their spirit, allowing whomever the current wielder of the grimoire to directly communicate and learn from any of the previous owners. It holds secrets, spells, powerful summonings, seals, techniques, information, and many more things. A wickedly powerful book, it is linked to it's owner, having a deep bond on an almost sentient level. It's current owner is Naraku Uchiha.