A valid library card

A book checked out from the library

A donation of a new or used, family-friendly book

People need only present one of the above to on Sept. 8 to take advantage, Krulder said. And the offer is also good at all state parks on Sunday.But if you're making a book donation, "none of that 'Fifty Shades of Grey'," he said to a large, chuckling audience at a Friends of the Island Parks meeting in August.Book lovers may also soon participate in Honeymoon Island's "Little Free Library box under the South Beach Pavilion.The box is part of an expanding project in Dunedin for people to share books around using the honor system — give one, take one.The first little free library was erected outside the Dunedin Historical Museum at Main Street and the Pinellas Trail in downtown Dunedin. They have been springing up around Dunedin ever since.As of Thursday, the Honeymoon Island box had been installed, but did not have books yet, Krulder said.