The Innsmouth Cycle: The Taint of the Deep Ones in 13 Tales

The Nyarlathotep Cycle: Stories about the God of a Thousand Forms (Chaosium fiction)

The Tsathoggua Cycle: Terror Tales of the Toad God (Call of Cthulhu Fiction)

The Hastur Cycle: 13 Tales of Horror Defining Hastur, the King in Yellow, Yuggoth, and the Dread City of Carcosa (Call of Cthulhu Fiction)

The Yith Cycle: Lovecraftian Tales of the Great Race and Time Travel (Call of Cthulhu Fiction)

The Cthulhu Cycle: Thirteen Tentacles of Terror (Call of Cthulhu Fiction)

The Klarkash-Ton Cycle: The Lovecraftian Fiction of Clark Ashton Smith (Chaosium Fiction) (Call of Cthulhu Fiction)

The Antarktos Cycle: At the Mountains of Madness and other chilling tales (Call of Cthulhu Fiction)

Mysteries of the Worm: Early Tales of the Cthulhu Mythos (Call of Cthulhu Fiction)

Tales Out of Innsmouth: New Stories of the Children of Dagon (Call of Cthulhu Fiction)