The product is a vintage paperback book titled "Lionel Trains Pocket Price Guide 1901-1993: Greenberg's Guide" by Roger Carp. It is a nonfiction guide published by Greenberg in 1901, focusing on the topic of trains, specifically Lionel trains. The book provides price information for Lionel trains from 1901 to 1993, making it a valuable resource for collectors and enthusiasts interested in the history and valuation of Lionel trains.