Crimson Tome

The Crimson Tome is found in Silent Hill 4: The Room in Room 302 of the Past. It teaches how to stop the 21 Sacraments.

Transcript
Crimson Tome

 She who is called the "Holy Mother" be not holy one whit. The "Descent of the Holy Mother" is naught but the Descent of the Devil. Those that be called the "21 Sacraments" be not sacramental one whit. The "21 Sacraments" be naught but the 21 Heresies. To give birth to a world of wickedness within the blessed realm of our Lord be blasphemy and the work of the Devil. If thou would stop the Descent of the Devil, you must bury part of the Conjurer's mother's flesh within the Conjurer's true body. Thou must also pierce the Conjurer's flesh with the 8 spears of Void, Darkness, Gloom, Despair, Temptation, Source, Watchfulness and Chaos.

Do so and the Conjurer's unholy flesh will become that which once it was, by the grace of our Lord. 

Trivia

 * There exists a collection of backstories about the game, called Another Crimson Tome.
 * In the game Fatal Frame 2, there are also sacred books referred to as the "crimson tomes".

Багровый том Tomo Rosso Tomo Carmesí