The product is a 21-piece set of 100% Self Correcting Course in English Language" from the year 1918. It is not signed. This educational material is a valuable collectible for those interested in historical teaching and language learning techniques. The self-correcting feature adds an interactive and engaging aspect to the course, making it a unique and informative piece for collectors or language enthusiasts. Also included with the 21 pc set is Brief Fundamentals, published in 1923 by Sherwin Cody. All 22 pieces would make a great addition to your collection. Please ask and questions or ask for more pics as our small store,does not take returns. Thank you