English Grammar for Students of German 4th edition: The Study Guide for Those Learning German

This series is highly recommended.
Choice

I recommend this series to anyone I know who is studying a language. These are the best, simplest and most easily understood grammar books I have ever come across. They have helped me tremendously.
Letter from a student

This text could come to the rescue of many beginning German students.
Die Unterichtspraxis

This book is excellent. Exactly what our students need, but for lack of time don't usually get in every elementary course.
Professor J. Martin, Baylor University, USA

I consider this text a necessity for most students of 1st year German.
Professor J. Richard Guthrie Jr, Christopher Newpo

Provides richly varied illustrations of grammar points featuring many examples of contemporary usage and recent lexical additions to the language.
Deutsch: Lehren und Lennen