Which is the best reference book for Direct Tax (CA final)??

hellow frnds....

m deepak again...from mumbai...

frnds i want to know the best reference book for Direct Tax....?? which is the best class in mumbai for DT????

hey i heared that if i go with Vinod Gupta...(i think) than there is no need to go classes for DT??? is it true...??? 

please help me....

thanks in advance....

urs...frnd...