Really Useful Book,
This review is from: Beginning Syntax (Paperback)
If you would like a really good explanation of sentence structure and some grammar, I would recommend this book. Given the original date of publication - not sure why it's so expensive. However, if you really want some understanding of sentence structure, as parents, educators and or those on a self improvement 'drive' - try this one.
Caution: If you want to get the best out of this book, do not attempt to start from the middle or skip sections. Examples are numbered so you need to refer back to previous numbered sections. Good luck!! ;-)