German Grammar Drills (Drills Series)

I would actively discourage students from using this book. It contains lots of grammatical and lexical mistakes (e.g. 'nur' vs. 'erst') as well as several mistranslations and non-idiomatic expressions which are likely to confuse language learners. I hope these mistakes will be corrected in future editions. Until then, I would recommend more reliable alternatives such as the workbook that accompanies Hammer's German Grammar.