I basically read the entire thing from Kaplan blue book general chemistry section. I am going over each problem one by one and it seems everything is very easy to me now. after i finished kaplan blue book test, I looked at the DAT destroyer and it was at least 5~9 times harder i believe. I can't even solve 1 single problem! have u guys ever tried DAT destroyer? well...if i can master the dat destroyer problems, I bet i can become chemistry genius. I thought I was chemistry genius with kaplan blue book problems but now....nah...i m noone. I lost my self-esteem after looking at DAT destroyer problems. is kaplan blue book really good enough? or should i master DAT destroyer?