In his book America's Lighthouses--An Illustrated History, Francis Ross Holland, Jr., wrote, "They are called lakes, but from the lighthouse point of view they have virtually all the characteristics of the ocean." The violent storms, gale winds, fog and ice found on the Great Lakes match anything found on the high seas. This set of five booklet stamps features lighthouses from each of the five Great Lakes: Spectacle Reef, Lake Huron; Third Mile Point, Lake Ontario; Split Rock, Lake Superior; Marblehead, Lake Erie; and St. Joseph, Lake Michigan.