This book is no different than the cheaper, 7th edition. I hate when publishers release new editions when the only objective is to make profit at the expense of broke college students! The 7th edition is from 2009, and this 8th edition is from 2012. I had both copies and just for curiosity, browsed them both, compared the questions, compared many sections. Guess what? They are practically identical. When I thought I saw a difference, it was merely with the phrasing of a question, just a noun/verb switch. Seriously? The text itself presents information that is easy to grasp, so it is a great resource. Just wanted to shed light on the insignificant difference of the two most recent editions.