The 500 Worlds: Titus - Battle Of Unity Collector's Edition Warhammer 40k Gamebook is a special edition book published by Games Workshop, featuring the Ultramarines army of Space Marines in the Warhammer 40K universe. This Army Book is written in English and is a must-have for fans of the 40k game. Produced in the United Kingdom, this collector's edition provides a unique insight into the intricacies of the Warhammer 40K universe, making it a prized possession for war game enthusiasts. unopened, new in box