The Fianna Tribe Book is a sourcebook for Werewolf: The Apocalypse Tribebook, written by Harry Heckel and published by Sourcebooks. This paperback book, with illustrations by Ww4325, provides detailed information on the Fianna tribe in the Werewolf: The Apocalypse universe. The book is written in English and serves as a valuable resource for players and game masters looking to enhance their gaming experience with the Fianna tribe's unique backstory, rules, and abilities.