If the book is dropped inside the Library, it will disappear. This is most likely to prevent the player from obtaining multiple copies in order to gain favour quicker by having the book readily available after a customer asks for it. The book speaks about the River of Souls and its role in Great Kourend's perception of the afterlife, along with excerpts from past experiences involving the Key Master's acceptance in the role of guarding Cerberus. It also mentions the soul bearer, an ancient artefact.