Books suficient for GMAT prep or joinCoachig Institues must?

[keshari.abhinav]

Hello everyone.This is Abhinav.I am planning to take the GMAT xam this year around June-July.Could anybody advise me on whether self study using some decent books like original guides, Kaplan, etc would be good for preperation or do i need to join some courses offered by coaching institutes?
Also, i have not been into lot of reading. Will i face difficulty in CR, RC, SC parts?

[Osirus@VeritasPrep]

Get the Manhattan GMAT math guides for math. Get the powerscore Critical Reasoning Bible. With Reading Comp, see if you can find a copy of the Veritas Reading Comp book. Its the best Reading Comp book I have seen, but they don't sell them individually.