The Unspeakable Oath 18 includes:

The Eye of Light and Darkness: Reviews of Trail of Cthulhu, The Day After Ragnarok, Black Wings, The Dying of St. Margaret's, New Tales of the Miskatonic Valley, Colour from the Dark, The Primal State, and Cthulhu 101.

The Branchly Numbers Edit: A Mysterious Manuscript by Pat Harrigan.

The Chinaman's Screen: An Arcane Artifact by Adam Gauntlett.

The Forgotten: An Arcane Artifact by Dan Harms.

The Art Show: A Tale of Terror by Nick Grant.

House of Hunger: A Tale of Terror by Monte Cook.

Mr. Popatov: A Tale of Terror by John Scott Tynes.

Slight Return: A Tale of Terror by Pat Harrigan.

Tales of Nephren-Ka: A history of particularly Lovecraftian pharaoh by James Haughton.

The Chapel of Contemplation: A look at the cult behind the very first scenario for Call of Cthulhu, by Dan Harms.

Black Sunday: A visit to the deadly heart of the Depression-era dustbowl, by George Holochwost and C.A. Suleiman.

Dog Will Hunt: A Call of Cthulhu adventure in 1920s Cajun country, by Richard Becker.

The Word: A Message in a Bottle by Shane Ivey.

The Unspeakable Oath 18 features art by Toren Atkinson, Dennis Detwiller and Todd Shearer, and page design by Jessica Hopkins. It was edited by Adam Crossingham, Dan Harms, Shane Ivey, James Knevitt, Greg Stolze, and John Scott Tynes.