Libellus Sanguinis: Wolves at the Door is the third in a series of sourcebooks that details the clans of Vampire: The Dark Ages. The Libellus Sanguinis books are similar to the popular Clanbooks, but each presents three clans in one! Volume three investigates the mad Malkavian, the hideous Nosferatu and the tricky Ravnos.
- Full coverage of three clans for the Dark Ages: the Malkavians, Nosferatu and Ravnos;
- New Discipline powers, Merits and Flaws, and other traits specific to the three clans;
- Expanded explanations of Dementation and Chimerstry.