The Friends of the Oak Park Public Library Book Fair returns to the Main Library. Underground garage parking (with the first two hours free) and elevator access are available. Hours are: Friday, July 10, 9 am-5:30 pm , open to all Saturday, July 11, 9 am-4:30 pm , open to all Sunday, July 12 noon-2 pm , fair volunteers only 2-4 pm , open to all Local nonprofits, schoolteachers, area