I am reading the kaplan biochem books, are you taking the class? if not, look around for one, maybe an upperclassmen some kaplan books that they could lend you.
anyway, i think they are really good, it's only about 300 pages or so, you could read it in a solid week for sure. i'm almost through it, and have been annotating in first aid as well if there is something in kaplan that isn't in first aid. that way, when i want to review biochem again, all i have to do is read first aid/my notes and i can probably review all of biochem in 2-3 days. I do have lippincots that i use for reference as this book has great diagrams. sometimes kaplan's diagrams and explanations lack so i just reference this book when necessary. it's an excellent resource to have at your desk.
good luck.