From publisher blurb: This product is intended for Old-School Essentials and the BX version of the world's most popular role playing game. The magic and terror of Halloween and it's ancestor Samhain are presented for your fantasy campaign within this wook. Rules are presented for: New Classes: The Witch, The Witchhunter and The Jack-O-Kin New spells for the witch New Ritual Magic rules for all spell casters New monsters inspired by monster movies! The Elder Sigh: Turning the Outer Dark Possession, Obsession and Exorcism Curing Vampirism Jack-O-Lantern magic And More!