The product is a set of three hardcover textbooks titled "British Locomotives of the 20th Century Vol 1, 2 & 3" by author O.S. Nock. The books are part of a historical series focusing on transportation, specifically trains and railways. Published by Guild Publishing London in the United Kingdom, the narrative is non-fiction and written in English, making it a valuable resource for those interested in the history of British locomotives in the 20th century.