GMAT Prep

HI Folks, I have started preparing for GMAT. I am planning to write my exam in June. Currently I am referring the book “The official guide for GMAT”. Please suggest and guide me about the books I should refer. Thanks, Ashish

HI Folks,

I have started preparing for GMAT.
I am planning to write my exam in June.
Currently I am referring the book "The official guide for GMAT".
Please suggest and guide me about the books I should refer.

Thanks,
Ashish