All Star Western Vol. 3: The Black Diamond Probability (The New 52): Featuring Jonah Hex;

When the workers and patrons of Haley's Circus sample Dr. McKee's Cure All, they begin a painful transformation into psychotic killers and it is up to Jonah Hex and Dr. Arkham find the source.

This volume collects All-Star Western issues 0, 13-16.