Oxford Practice Grammar Intermediate (2006)

Updated edition, 2019 John Eastwood's intermediate book is the main alternative to Murphy, and some learners simply get along better with its explanations. Each unit covers one important grammar topic, and downloadable tests at the end of each unit or section show you how much has stuck. The feature that sets it apart is the exit test at the end, which tells you whether you are ready to move on to the advanced book in the same series. That makes it a good choice for anyone who wants a clear sense of progress rather than an open-ended reference. Buy the version with key if you are working alone.