The product is a hardcover book titled "Multiverse: Exploring Poul Anderson's Worlds" published by Subterranean Press in 2014. It is a signed limited edition book with a slipcase and has been signed by 18 contributors including Harry Turtledove, Robert Silverberg, Larry Niven, and David Brin. The book is a collection of science fiction stories with a focus on space exploration, technology, aliens, and galactic conquest. The book is illustrated by Bob Eggleton and has special attributes such as slipcase, # 11/250.