Most adapted book in the horror genre

The book that has been made into a horror movie the most times is The Strange Case of Dr Jekyll and Mr Hyde by Robert Louis Stevenson (UK; 1850–94). This 1886 novella has been adapted for the screen 28 times as of 2024.

The first screen adaptation of "Jekyll and Hyde" was made in 1908, just 22 years after the book was written. About 10 versions were made in various languages before 1920, but most of these have not been lost. The most famous retelling of the story was made in 1931 by director Rouben Mamoulian for Paramount Pictures. This classic of Hollywood horror starred Frederic March in both the title roles, and won an Oscar for its special effects, most notable being the transformation scenes

The next most adapted books are Frankenstein by Mary Shelley and Dracula by Bram Stoker, both tied on 21 adaptations each. Behind them is Edgar Allan Poe's short story The Tell-tale Heart, with 14. Edgar Allan Poe is, however, the most adapted author overall.