The product is a book titled "Westland Lysander Mks. I, II, II/IIIA, III(SD) / IIIA(SD), TT Mks. I, II, III" by authors Michal Ovcacik and Karel Susa. The book is written in English and published by Mark I Limited. It focuses on the history and specifications of various models of Westland Lysander aircraft, covering a range of variants including Mk I, Mk II, and Mk III. The authors provide detailed information and insights into the design, performance, and service of these iconic aircraft, making it a valuable resource for aviation enthusiasts and historians alike.