ReseñaGrammar in Use Intermediate Fourth Edition, authored by Raymond Murphy, is the first choice for intermediate (B1-B2) learners of American English. It is a self-study book with simple explanations and lots of practice exercises, and has helped millions of people around the world to communicate in English. It is also trusted by teachers and used as supplementary text in classrooms. This fourth edition is available as an ebook and printed book. The ebook works on PCs, Macs, iPads and Android tablets. It has the same grammar explanations and exercises found in the printed book, plus other great features such as audio and an easy-to-use answer key.