I just happened to have a copy of this book, I don't really recall how I got it/when I bought it...
A group of old men gets a strange disease and no one knows how they got this disease. It happens to be that all of them entered in a project with life prolonging hormones. It seems like there is something wrong with the experiment?
The writing is similar to her other books, but somehow I thought this book to be more readable. At least I read this book much faster than I read Harvest and I actually thought that this story was more interesting. The creepiness of a disease like Creutzfeldt-Jacob is enough to terrify me. But that, of course, is a matter of opinion. As I said, I'm planning to read more of her books soon.
Note: I read a Dutch translation of this book