Samhain’s music is the gale outside! It’s the howling of werewolves and vampires, the wailing and moaning of vengeful ghosts, and ghouls grinding their teeth! The beann’shie howls and cries and whoever hears her cry is destined to die soon. Every evil spirit leaves its hideaway, witches fly to their last coven before winter! Samhain is a night of frights, of marvels and visions!

— The Tower of Swallows (The Witcher Book 4) by Andrzej Sapkowski