Whats the first book that seriously scared you?

[Number 2 Pencil]

As a little kid I was really scared by the book-form of Alien the movie. Somewhere in the book, maybe as a teaser on the first page or maybe on the back book cover, was a graphic description of how the alien layed an egg in the guy's stomach. It scared me so much that I never read the book, even though I checked it out of the school library at least twice.

First book otherwise that really gave me a chill was The Hot Zone, by Preston. The idea of an outbreak of ebola is very scary.