Butler Public Library, 218 N. McKean St., will host local author Michael Dittman as he discusses his fourth book “Who Holds the Devil” at 6 p.m. Wednesday.

When a tragic accident topples an ancient oak onto the wall in front of his house, all Aaron Moody wants is for the city to repair the damage. Instead, he uncovers an underground world of spells, secrets, and — released from within that very oak — a demon who last walked the Earth in human form following the Civil War.

Copies of the book will be available for purchase at the event. Contact Dianne at dmccauley@bcfls.org or call the Butler Area Public Library at 724-287-1715 for more information.