I used this older edition for my class that required the latest edition and I was perfectly fine. The information and images are basically the same- there is some differences in wording and order that the info is presented but overall it is the same as the latest edition. Also my professor used many of the images directly from the text on our exams and all of the ones that he used in the new edition were the same. Def. recommend getting this version- it will save you money and you will get the same as if you used the newer edition.