Author Kathryn Witt will hold a presentation for her guidebook,Secret Cincinnati: A Guide to the Weird, Wonderful, and Obscure, at Roebling Point Books, 306 Greenup St., Covington, KY 41011. This event is set for Saturday, April 13 from 12:00 p.m. to 2:00 p.m. Admission is free and open to the public. Kathryn will be introduced by John Witt, the photographer for the book. She will discuss six “secret” venues from the book, show some artifacts, and share details about why they are located in the greater Cincinnati/Northern Kentucky area.