Bests & Worsts Reviews from Amazon

I was very excited to receive this book; however, within minutes- minutes- I found glaring inaccuracies. As an example, Lesson 163, page 164 , focuses on learning the root 'ec.' The first vocabulary word is 'eccentric.' The problem is that the root of 'eccentric' is actually 'cent(r)' which means, rather obviously, 'center.' In the word 'eccentric,' the prefix 'ec' means 'out of.' At the beginning of the book, the author highly recommended approaching vocabulary acquisition by learning the roots of words, so one would hope that the lessons relating to roots would be, um, accurate. I'm soooooooo disappointed, and hope you don't waste your money like I did!