This also comes as a package with a CD and the textbook "Elementary Principals of Chemical Processes." This (text) book is apparently out of print. The examples worked out in this workbook are very explicitly shown, step by step. They're similar to the problems in the text at the ends of the chapters. They're taken from the textbook that was version 2. I found that if you work through these problems successfully, and do the homework from the book, as well as read the text, you'll do well in the class. The only issue with the package set is that the CD ROM doesn't really work on my Windows 8 machine. The price for the entire package NEW was less than a used version of the text only in the bookstore at my university. It arrived quickly, and sometimes chemical engineers keep this textbook on their desks throughout their careers. The workbook makes a great little addition: it talks you through the problems rather than working them out with no explanation, like you would from a webpage or something TELLING you how to do it. Thank you for the help in this class, it brings it all together nicely!