Is objective mathematics by rd sharm an apt book to crack jee advanced ? If not suggest me a book with tough sums .

@ suhaibks 
u have previously told that u aim to crack jee mains , and not advanced , for that reaso i suggested you to go for objective maths by r d sharma . 
but if u want to solve tougher than that , then , go for maths by m l khanna . 
or IIT MATHEMATICS BY A D DAS GUPTA . 
the both are good and contains good no of tough questions with proper solution .. 
ALL THE BEST ..