In the two decades, since Staff and Educational Development Association was formed, educational development has become a mature and internationally recognised discipline, informed strongly by the scholarship of teaching. Writing about teaching, learning and assessment has helped to describe, distil, analyse and affect practice, and to change the way in which educational development as a profession has become regarded. Books have been of great importance in this transition, with educational developers in many parts of the world building a learning community through discussing the books on their shelves. This article provides a personal selection of 20 key books that have been highly influential, with the aim of promoting debate both on the choice of texts and the future of educational development books in the next 20 years.