Manual of the Planes may refer to: * Manual of the Planes 1st edition (1987), the 1st edition Dungeons & Dragons supplemental sourcebook, by Jeff Grubb. * Manual of the Planes 3rd edition (2001), the 3rd edition revision of the core cosmology, written by Jeff Grubb, Bruce R. Cordell, and David Noonan. * Manual of the Planes 4th edition (2008), the 4th edition revision, written by Richard Baker, Rob Heinsoo, and James Wyatt. During the 2nd edition of Dungeons & Dragons, the Planescape and Spelljammer campaign settings filled a similar role.