The product is a hardcover book titled "BBC Doctor Who: The Silent Stars Go By & Touched By An Angel" published by BBC Books in 2011. The book is part of the Doctor Who series, written by authors Dan Abnett and Jonathan Morris. It focuses on the Doctor and other characters from the popular science fiction series, exploring various adventures and themes within the Doctor Who universe. The book is a must-have for fans of the show, offering a unique and engaging reading experience set in the world of Doctor Who.