The Codex Adeptus Astartes Deathwatch 7th Edition is an Army Book published by Games Workshop for Warhammer enthusiasts. This book specifically focuses on the Space Marines army of the Deathwatch Chapter, providing players with in-depth information and rules to enhance their gaming experience. Written in English, this book is a valuable resource for those looking to expand their knowledge and skills in Warhammer, particularly in the realm of the Deathwatch Chapter.