Of the famous Examkrackers 101 Series, which books are a must and how much do they help. From what I heard the Verbal 101 is a must, buts its nowhere to be found, and its selling on ebay for $50. How about the Bio 101, and General Chem 101? and O chem 101? Which ones should I get? Is the General Chem 101 book helpful, I started studying for the MCAT starting with the General Chem and Verbal books (not the 101 books) so I need some advice before purchasing, thanks!