This sourcebook for the innovative new Cards & Quests role-playing game presents more than 50 monsters to challenge the physical, mental, and spiritual mettle of adventurers at all levels. This fully-illustrated, 42-page manual also includes detailed guidelines on running encounters between characters and creatures in the Cards & Quests tabletop game system. All of the monsters presented here are associated with the system-free Swords of Kos Fantasy Campaign Setting and can be easily incorporated both into games that use it or other settings altogether. They are inspired by the myths and legends of the Classical world and include everything from familiar creatures like the Centaur, Harpy, and Medusa to more exotic ones like the Empusa, Hippalectryon, and Ophiotaurus.