For the people of Irvington, ghosts are not just for Halloween; they are a living presence that helps us uncover Indiana's rich history of unsolved crimes and foul play. On the third Saturday of each month, experienced ghost researcher Alan Hunter, who has been going to the Gettysburg battlefield for over 15 years, will be sharing his wisdom in a series of talks with topics ranging from E.V.P. (ghost voices caught on tape, the subject of the Feb. 21, 7 p.m. event), to Ouija boards, crypto zoology and orbs. The Ichabod Crane Society of Things That Go Bump in the Night meetings are hosted by Bookmamas bookstore, 9 S. Johnson Ave., a dimly lit bookstore in historic Irvington across the street from open-late coffee shop, Lazy Daze. The talks are casual, crowded and can run late into the night as listeners are invited to share their own stories or seek ghost hunting advice after the lecture. Plan ahead so that you can grab a coffee beforehand, and consider bringing a lawn chair because seating is limited. Admission to the talks is one canned food item to benefit the Irvington Food Bank.