Is there a difference between the Princeton Review books that are available on amazon.com and the Hyperlearning books that are only available through their course? I've read somewhere that they are actually the same except that the ones on amazon have passages after each chapter, which the hyperlearning books do not have. But the hyperlearning books combine all these passages into their science/verbal workbook. So if this is true, will I get the same amount of practice passages by buying all the PR books on amazon as the hyperlearning science/verbal workbook?