OSR Advanced Players OptionsHardcover, smyth-sewn binding, A5 black and white book, A5 format. 340 pages. The OSR Advanced Player Options books compiles several years of material into a single book designed to expand any OSR-style game. Written for Old School Essentials, it contains the following: Guidelines for running successful play-by-post games. A simple skill system. Rules for founding temples and using the divine energy that worship generates. Rules for improving magical weapons by performing feats of derring-do. A simple prestige class system based on rules from the BECMI Gazetteers A bunch of new race-as-class options, including binder (from 3.x Tome of Magic), monk, necromancer, parrot-folk, and more. Rules for researching spells and creating magical items. Rules for ritual spells. Dozens of new spells.