9. Call of Cthulhu by H.P. Lovecraft
This unnerving book is written by one of the best horror writers out there. It follows a young professor carrying on his uncle’s work as he finds out things about something called Cthulhu. The imagery the writing conjures up is unsettling, creepy and will stay with you a while after you’ve read it. You probably also find yourself so caught up in the book that what you’re reading could be real.