Probably not the worst I ever read, but whenever a question such as this comes up my mind immediately goes to one of the Tarot books by Piers Anthony. I don’t remember which one, it was just in a pile of books people left in a dorm one time and I had nothing to read. I finished it, but I can’t tell you anything about it other than the vague recollection that I hated it.

As far as I can tell from a cursory Google search is the original said “Russian neighbors”

I will also say it’s hard to choose. I suppose it really depends on my mood or feelings at the time. However that being said, Pod People is the most memorable to me, followed extremely closely by Cavé Dwellers.

Even honey isn’t okay with some (I have no idea the %, could be most or just a small number) of vegans. So regardless of how the blood was obtained, there is at least some who would not consider it vegan.