The product is a lot of private pilot training books by Gleim Aviation, a well-known publisher in the aviation industry. These books are written in English and cover topics related to training for private pilot certification. With a focus on the private pilot rating, these books provide valuable information and guidance for aspiring pilots looking to obtain their licenses. Ideal for those looking to enhance their knowledge and skills in the field of aviation, this lot of training books is a valuable resource for anyone seeking to become a private pilot.