Read through the main text book, make sure you get a solid grasp on the concepts. They are fairly easy once you understand them. And then practice the revision kit, atleast twice, or ideally till you get all questions right.
Both Kaplan and BPP are good. Kaplan is to the point and concise, if you do not get much time to study. BPP is more detailed and wordy and takes time to read through. But both books cover all topics.
Hope this helps.