I bought the old version of HY cell and molecular b/c it was supposed to be the greatest book ever or something and I thought it was kind of a waste of money. It is a very basic overview of Genetics, and almost everything in there was stuff I already knew and considered pretty basic. It is a very short book and takes maybe a day to read so it couldn't hurt to read it, but just don't expect this book to get you more than one or two extra questions max unless you are weak in genetics. Basically buy the book if you consider yourself weak in Genetics. If you took genetics in college or it was covered well at your school, you shouldn't need it in my opinion.