Like a lot of e-textbooks, this version is lacking in a lot of areas. Forgiving the usual copyright problems with including certain appendices and images, the e-book often has the wrong problem designations when compared to a physical copy. I ran into a lot of issues where I was assigned a certain problem to do in the companion workbook for class but the e-text had typos or errors and didn't include the information I needed to complete the exercises. I eventually broke down and bought a physical copy after 3 chapters of the same situation occurring. Be wary of e-texts. All of the information as far as text is fine but a lot of the problems and appendices are often missing or have huge errors that prevent you from getting your work done.