I keep thinking of 'Dracula' for some reason when I think of this book?? I honestly cannot remember the title, and it's one of those long forgotten things that if someone did suggest the right title it might not even jog my memory!!
In a similar vein, I remember going on holiday as kid and someone had left a small horror comic in a caravan, the story I remember was a man going into a large greenhouse that had lots of butterflies flying around, one of them settled on his finger and when the butterfly flew off it had eaten the tip of his finger down to the bone, then all the butterflies landed on him and all that was left was his skeleton!!
Gee, I did read some morbid stuff as a kid

I also think the film 'Killdozer' was playing on the TV!