From publisher blurb:
This installment of the Occult Skill Guide introduces: pact magic. This special type of ritual magic allows you to summon occult spirits from the Byways in order to strike a bargain with them, offering your own powers and experiences in exchange for incredible supernatural power. But of course, as with everything, there’s always danger in every deal! In addition to providing the new spirit binding occult ritual, this product also introduces complete rules for spirits and a total of six spirits that your characters can summon: Aza Azati, Coralene, Kevix the Quick, Rextavious Zul, Tommy Greensprout, and Yith’anu!