You can find endless variations of horror books written especially for an adult, teenage or children's audience. These books have specific characteristics that determine their content, themes, approach and characters, among other particular aspects.
For adults. Horror books for adults are the most varied and versatile in terms of their themes, as you can find variants of psychological horror, horror and romance, horror and suspense, etc. Among the classics you will find "Dracula", "Frankenstein" and "The Exorcist", among many others.
For teenagers. Teenagers tend to choose horror works with dynamic themes, so books like "It" or "Carrie" could be a fantastic choice. Older ones can dabble in novels such as "The Black Cat" or "Macabre Tales" (both by Allan Poe).
Children's. It may seem strange and even perverse that there are children's horror books; however, these "scary" stories for children give a different approach to the genre, combining it with humour, tenderness and fun, where in the end the bad guys don't end up being as bad or terrifying as they seem.