Ryan and Kendra are unexpectedly back in Maple Harbour with their cousins Claire and Nathan. Adrift in the fog, they stumble upon an island that is an important bird nesting site, with an old, abandoned lighthouse. But why is the island for sale, and who are the mysterious buyers? As the community rallies to save the island, the four children and their dog Meg investigate a series of puzzling clues. Is there more to the old lighthouse than first appears? Join the four friends as they attempt to unravel another Maple Harbour mystery! Children aged eight to twelve will love this classic tale of adventure that recalls an earlier era of outdoor fun, leisure, and independence.