PTCB exam basic questions?

I recently got a job at Walgreens as a pharmacy technician. I worked full time for a month, but am going to only be working about 16 hours a week for the next 6 weeks and thought that it would make sense to devote my time to PTCB exam preparation. I am 19 years old and am very proficient in math and biology/chemistry. I just want to get some tips on what books to buy to prepare for it, and what material to focus the most time to. I have quite a firm grasp on sig codes and the mathematics behind dosages and conversions. I believe that my biggest problem, at this point, would be drug information. Generic equivalents, side effects, whether its a controlled substance or not, and what the drugs main effects are. I also have little to no knowledge of laws that govern how a pharmacy runs. Thank you in advance.