Warhawk Interact 2024 FREE Book Fair! Arrowhead High School’s Warhawk Interact club is holding their second annual FREE book fair May 11th from 9 AM to 12 PM in the South Campus Cafeteria (700 North Ave, Hartland, WI)! They have over 7,000 FREE books to give away, ranging from all ages and genres. It’s a great event for the whole family. There are free snacks provided, too! They hope to see you there!