The Book of the Damned

This skinbound tome is "the multiverse's single greatest collection of profane lore," and which is constantly updated with the evils of every hellish plane. It is comprised of four parts: Daemonic, Demonic, Diabolic, and Horrific.

History
This unholiest of tomes was written by an angel with the purpose of cataloging all of the planes. However, the other angels saw it as damnation made solid, and demanded its destruction. Before this could occur, the book vanished. The various chapters are as follows. These four parts have been separated and scattered throughout the multiverse, having touched the lives of many, and never for the better. Its favorite tact is to disguise itself as a different book of desire, fooling one into reading it, and insinuation a portion of itself into the reader for the purpose of spreading its corruption, by either the harm of others, or the inscribing of another copy of the chapters read.
 * Daemonic, detailing Menauros, the NE gods and their daemonic servants, directions to the plane, and profane knowledge of almost any evil spell.
 * Demonic, detailing Keth, the CE gods and their demons who dwell there, directions to the plane, and the way to corrupt almost any soul.
 * Diabolic, detailing Thanatar, directions to the plane, the LE gods and their devils in the cold darkness, and the sins of almost any being.
 * Horrific, detailing the Dark Tapestry of space, directions to the void, the CN gods and thier servants who live there, and the way to destroy almost any entity.

Daemonic
Having been found on Airth-1001 by Liam Flynn at a young age, it insinuated part of itself into his mind. Liam later lost the book, but the part left within corrupted his soul to an extreme, influencing him to cause the death of thousands, both stranger and friend. When Liam was combined with his alternate self (accidentally killing him), the result was the release of this corrupted entity into the control of Liam's new body- now a vampire. Upon "curing" Liam's vampirism, this corupted fragment was destroyed, and Liam's soul was returned to his body sans the cruel influence it had left within him. Unfortunately, this seems to have had no impact on the original chapter, which remains back on Airth-1001, likely in the planetary library.

Demonic
Believed to be in the possession of the Dream Demon Lord, this section has provided it with the power necessary to maintain its grasp on that title.

Diabolic
This tome chapter is most certainly being used by the Aboleth Wizard on Airth-815, where its evil powers are being used to turn the inhabitants into crab-people. It also appears to be planning an inter-dimensional assault on other Airths in the Multiverse.

Horrific
Found in Rhask Library on Airth-2016, this section has touched upon the lives of many of the one-upon-a-time crew of the S.S. Spellglider, having left a piece of itself in the minds of Zoya, Pandora, Grimp, and Dree, and threatening to spread to other books in the ship's library. It has since been returned to Rhask, awaiting the next to fall victim to its evil.

Destruction
The cruel tome can only be destroyed by first reuniting the separated parts into the whole (which will bring the attention of many deities, good and evil alike), and then separating them again, destroying each chapter within the same 24 hour period via the following methods:

Daemonic
Scrubbed clean of its ink by the tears of a good outsider.

Demonic
Fed in its entirety to a lawful or god outsider.

Diabolic
Used as the source of kindling for a pyre which burns a good or chaotic outsider alive.

Horrific
Rewritten into praise for life and creation by a Lawful outsider.