Gruesome Death Books contain narrative depictions of the victim deaths that happen in the game. The passages are tailored to the various cards that can kill a victim. When that happens, you will look up the passage based on the location and killer you are playing and it will tell you how they died. There are 5 books, one for each Series 4 location each of which has deaths for each of the 6 killers in Series 4 (5 FFs + the Vignette).