Free Comic Book Day dates back to 2002 and was started to help bring new readers into independent comic book stores. Local shops and libraries across the city and county will observe the event and offer visitors free comics. Apotheosis Comics & Lounge owner and resident comic book expert Martin Casas; Jim Mahfood, a St. Louis native who worked on “Spider-Man: Into the Spider-Verse”; and Maggie Thurston, an indie comic artist, talk about the celebration and comics in general