Too bad, I've only got the 7th edition, 😛 but its a great resource for DAT Bio preparation. Though there are a lot of changes between the 7th and 8th edition (one of the writers is a mentor of mine), but not bad to use the 7th edition for studying bio.
I feel old (although I'm not), just because my edition of campbell is 5th edition. haha. Just because that was for Ap bio in high school... my university didn't use campbell's although personally, I like it better.