Practical English Usage (3rd Edition)
English Grammar In Use with Answers and CD ROM: A Self-study Reference and Practice Book for Intermediate Students of English
Essential Grammar in Use with Answers: A Self-Study Reference and Practice Book for Elementary Students of English
Advanced Grammar in Use with Answers
In at the Deep End (Speaking Activities for Professional People)
My Grammar and I (Or Should That Be 'Me'?): Old-School Ways to Sharpen Your English