I've found some collections of horror stories for you, as well as some scary books that may be based on real events.
Spooky America: Four Real Ghost Stories / by Lori Haskins.
Recounts four fact-based tales of hauntings including a ghost horse on the coast of Massachusetts, a haunted painting at a Virginia plantation, a skeleton in Colorado, and a ghostly sea captain of California.
Ghosts / by Kelli M. Brucken.
Examines ghostly figures and what people have thought to be ghost-like experiences.
Haunted Houses / by Kelli M. Brucken.
