A Practical English Grammar
Practical English Usage
Practical English Grammar: Exercises: No. 1: Grammar Exercises to Accompany a Practical English Grammar (Bk. 1)
Advanced Grammar in Use with Answers: A Self-Study Reference and Practice Book for Advanced Learners of English
The Ins and Outs of Prepositions: A Guidebook for ESL Students
English Vocabulary in Use Upper-intermediate with Answers and CD-ROM
English Collocations in Use Intermediate