I read this as a teenager and it hasn't aged well. It's good but quite melodramatic at times. I can see how it was groundbreaking for its time. The scientific explanations for vampires is a good idea but in practice you're reading a bunch of nonsense to explain an imaginary problem. I just didn't' care. I could've stood a bit more focus on the paranoia toward the end(trying to not spoil). 
 The short stories were bad then and are unreadable now, besides Prey. The guy has great ideas but the dialogue is awful(maybe explains why Prey works so well, there's not much talking). The Dance of Death is a great idea but so utterly tedious that I barely made it through. I'm not a big modern short-story guy so maybe it's just me.