Islands by nature are mystical, mysterious, and mutable. So it seems fitting that Plum Island. about a mile beyond the eastern tip of Long Island’s North Fork, is shaped like a question mark. But this island is different. Join Amy Kasuga Folk, co-author of A World Unto Itself: The Remarkable History of Plum Island, New York, as she surveys the history of this mysterious place. For additional information. please call the library at 631-567-5079 or visit our website.