From the back of the book:Adrift on the River of Dream is the core sourcebook of spirituality, magic and dream for Tribe 8. Inside is all the information necessary to run spiritual and mystical campaigns, along with new rules and information on Synthesis, Sundering, Dreaming, Technosmithing, Ritual, Spirits and the River of Dream. Also: - A cosmography of the River of Dream, including the various Orbs and Spheres - Rules and guidelines for making rituals, Dreaming and Spirits a major part of a cycle - New information on Guides, Heartstones, the Z'bri and the Great Architecture - Many new groups and locations - Eight new Aspects, two new Technosmithing formulae, a dozen new rituals and three new Sundering Aspects - New spiritually-oriented Perks and Flaws. - BoardGameGeek