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
With [this book]...students will be able to resolve many problems for themselves, thereby freeing teachers for more profitable work in class.
Modern Language Journal
This manual will prove to be a very effective help to students who have a less-than-solid background in English grammar...I would strongly recommend this study guide.
Professor James R. Stamm, New York University, USA
Excellent book! Provides students with the essentials of their own native grammar necessary to comprehend the similarities and differences between English and Spanish.
Linda Q. Sites, Virginia Commonwealth University,
Obviously useful at secondary school level although with the rapid growth in ab initio university courses, it is by no means out of place in higher education...the good indexing and cross-referencing mean that it is particularly easy to use as a reference work.
Modern Language Review
This impressive study guide should prove useful to anyone who takes the learning of Spanish seriously. A book that should prove valuable to teachers and students alike.
Bulletin of Hispanic Studies