The product is a limited edition first print hardcover book titled "Promethean Sun" by Nick Kyme. Part of "The Horus Heresy Series" from the Black Library, this science fiction novel was published in 2013 in the United Kingdom. With only 3000 copies printed, this edition is signed by the author and features a unique number (2281/3000). The book spans 9 inches in length, 6.5 inches in width, and 1 inch in height, weighing 10 ounces. Written in English, this novel offers a thrilling narrative set in the Warhammer 40k universe during the Horus Heresy era.