Andre and Lucas are twin brothers who live on PEI with their park warden mother and veterinarian father. Their mother is working to protect piping plovers, and the boys join in, helping to put up gates around nests and making sure no one trespasses in the sensitive area. When one nest is destroyed, the boys have to do some handy detective work to find the culprits. Written in an accessible, engaging style, and illustrated with line drawings by Diane Lucas, Keep Out! is the perfect choice for emergent or reluctant readers who like a good mystery.