The new setting book adds mythical creatures from British and Irish folklore to the Vaesen: Nordic Horror Roleplaying game (see "'Vaesen: Nordic Horror Roleplaying' Game on Kickstarter"). This book also adds new gothic horror mysteries from the land of Mary Shelley, Arthur Conan Doyle, and Bram Stoker to campaigns. Mythic Britain & Ireland is written by ENNIE-winner Graeme Davis with illustrations by ENNIE-winning artist Johan Egerkrans.

Free League Publishing also produced Vaesen: Wicked Secret & Other Mysteries (see “Dive Deeper into Nordic Horror with ‘Vaesen: Wicked Secret & Other Mysteries’”).