The Referee's Tome. Cover art by Peter Mullen. Details in gold foil. 248 pages, A5 (Digest-sized). Old-School Essentials Advanced Fantasy book 2 of 2. The Referee's Tome contains a massive bestiary of over 300 monsters, extensive encounter tables, a hoard of over 300 magic items, advice on refereeing, and guidelines for creating adventures. In conjunction with the Player's Tome, everything a referee needs.