The Warhammer 40k Codex Tau Empire is a hardback RPG book sourcebook published by Games Workshop in 2018. This army book is specifically tailored for players who command the Tau Empire faction in the Warhammer 40k universe. With detailed information on the army's units, abilities, and strategies, this book is a valuable resource for both new and experienced players. Written in English and suitable for a range of age levels, this book is a must-have for fans of Warhammer 40k looking to enhance their gameplay experience.