Top critical review
DON'T GET THE 6TH EDITION.
Reviewed in the United States on January 25, 2016
If you're wondering whether to purchase the 5th edition or rent the 6th edition, go with the 5th edition. I have both and they are EXACTLY the same, only the 5th has a much better quality. It looks like they were in a hurry to release the 6th edition because the pictures look HORRIBLE. They're blurry, the arrows pointing at stuff are broken. Some font they use is super blurry, too. Take in mind the same images are on the 5th edition, only in the high resolution you would expect. The 6th edition was completely unnecessary in my opinion.