Spanish language learning forums

I have only just recently begun learning Spanish,but I'm keen to get working on grammar.

I'm an English language teacher and I often use Raymond Murphy's English Grammar in Use with students,it's one of the better English grammar books with lots of gapfill exercises that get progressively harder and which are tailored towards the different levels of students(beginners,intermediate,advanced).

Is there a Spanish equavalent of this book,I know that there are Spanish grammar resources on the internet, but ideally I want a book where there is a logical progression and where difficulty gradually increases.
I would appreciate any suggestions.

Gracias

Grammar books