Book from Sven's Farm

Book from Sven's Farm is an unfinished book that is the reward from Sven's Revenge, and is used from that quest on in all the quests until Finding the Shadowy Figure. It is only a partial story, for the full text check out Jitters' Completed Journal, which you are given at Finding the Shadowy Figure as a replacement for the partial book.

The story itself is part of the lore of the Defias Brotherhood, not of their creation but of the start of their demise, as well as the appearance of the worgen.

Source
This item is provided as an objective for the following quests:
 * The Shadowy Figure
 * The Shadowy Search Continues
 * Inquire at the Inn
 * Finding the Shadowy Figure