To open this trophy or accomplishment in Call of Cthulhu you need to locate every one of the three books of unholy information.
In the video control beneath you will discover every one of the areas of the individual books. This activity isn’t required to finish the game, yet it enables you to raise the degree of Occultism of the legend, so it merits doing it.
Peruse every one of the books of unholy information
Books Location Guide
Book #1: Chapter 6 – Office before the Gallery
Book #2: At the back of the bookstore’s main room
Book #3: In Doctor Fuller’s Office