These are the third edition (published 2016) NOT the revised edition (published 2019). There are not a great many differences between the Third 2016 edition and current Third Revised edition 2019 other than the inclusion of the Victoria College of a music Graded Checklist (Associated Board or Trinity students will not require this) and a somewhat clearer layout for just one of the topics (Grouping of Rests). The 2019 edition marks in italics some topics as optional topics in the current 2020 ABRSM syllabus but the content and all subject matter is exactly the same in both editions. Therefore this is a fantastic value package. We are selling these three books only together (All-In-One: 1-3, All-In-One: 4-5 and the corresponding Answer book) so you receive THREE books in total! A fantastic value package.