I would suggest you to start with GMAT Grammar Club book first.
My plan was to do with MGMAT then Aristotle.
But i guess, should follow nammers.... Lol...
The other thing is, u can do them in parallel....
If u are a non native speaker, i would strongly suggest you to first go through the first 7 chpters og GMAT Club Grammar book
and then think of moving to other books....
D- Day December 30 2011. Hoping for the happiest new year celebrations !
Aiming for 700+
Kudo me if the post is worth it