i am an engineering graduate. i want to take GMAT in next 3 months. i am okay with the quant basics at present but not in RC and other categories. please suggest me the strategy for taking on the GMAT in 90 days. also the books that i should buy now itself for preparation. please guide me. 
achieve81
Welcome to the forum. 90 days should be adequate for most students to be successful in GMAT. The preparation effort depends on what your target score and where you stand today. This forum has wealth of information in terms of prep strategies and prep material. I would suggest you check the resources section of the forum.
https://www.beatthegmat.com/resources.html
You could take a prep test to see where you stand and identify your strength and weaknesses.
Wish you good luck
Prasanna\













