Horror books are a type of fiction book that is intended to scare the reading audience. Horror books often include other genres in the story, like the supernatural of fantasy books or the romance in romance books.

According to Google Trends, the popularity of horror books has gone up in since the beginning of 2007. The top five countries to search for horror books, in order, are: United Kingdom, India, Philippines, United States, and South Africa. The top five cities in order are: Birmingham (United Kingdom), Manchester (United Kingdom), Dallas (USA), Philadelphia (USA), and Chicago (USA).