Open Library
Horror
Fear is the oldest story.

Dark Love
Nancy A. Collins

The Baby-Sitter II
Robert Lawrence Stine

The Southern Book Club's Guide to Slaying Vampires
Grady Hendrix

The Tell-Tale Heart and Other Writings
Edgar Allan Poe

Hellboy
Mike Mignola

Bloodlust
Lisa Jane Smith

American Short Stories
Charles Sears Baldwin

Histoires Extraordinaires (Balloon-Hoax / Descent into the Maelstrom / Facts in the Case of M. Valdemar / Gold-Bug / Ligeia / Mesmeric Revelation / Metzengerstein / Morella / MS. Found in a Bottle / Murders in the Rue Morgue / Mystery of Marie Roget / Purloined Letter / Tale of the Ragged Mountains / Unparalleled Adventure of One Hans Pfaall)
Edgar Allan Poe

In the blood
Stephen Gresham

The return of Skeleton Man
Joseph Bruchac

Dark Water
Kōji Suzuki

Last Tale of the Flower Bride
Roshani Chokshi

Campfire Chillers
Edith M. Freeman

21 Great Stories
Abraham Harold Lass

The Hatching
Ezekiel Boone

Red, white, and blood
Christopher Farnsworth

How to Sell a Haunted House
Grady Hendrix

You Like It Darker
Stephen King

Later
Stephen King

The Road to Science Fiction From Gilgamesh to Wells
James E. Gunn