Queens Library at Forest Hills, 108-19 71st Ave., will be closed on Monday, August 27 and Tuesday, August 28. During that time, an exterior 24/7 materials return kiosk will be installed. This will allow customers to return library materials at any time, whether the library is open or not. The closest alternative library locations are in Rego Park, 91-41 63rd Dr., Briarwood, 85-12 Main St. and Kew Gardens Hills, 72-33 Vleigh  Pl. Customers can avoid late fees by renewing materials by phone at 718-990-0508 or on the Web site, www.queenslibrary.org.