These books can be bought as a set or individually. Here is the information for each book:8083-31AV1: AMT Handbook - Airframe, Volume 1ISBN 978-1-61954-826-8$34.95 Retail8083-31AV2: AMT Handbook - Airframe, Volume 2ISBN 978-1-61954-831-2$34.95 Retail8083-32A: AMT Handbook - PowerplantISBN 978-1-61954-836-7$34.95 Retail8083-30A: AMT Handbook - GeneralISBN 978-1-61954-692-9$34.95 RetailEach of these books are also available as eBundles (print book + eBook) and as part of the downloadable AMT eKit (part number AMT-EKIT-AD).