The product is a hardcover book titled "Diocletian and the Roman Recovery" by Stephen Williams, published in 1985. This non-fiction historical book, written in English, offers a narrative about the Roman era in the 1980s, focusing on the contributions of Diocletian to the recovery of the Roman empire. The author provides a detailed account of the historical events and figures that shaped this period in Roman history, making it a valuable resource for those interested in the genre of history.