In the third book of Adelyn's Adventures, a girl travels in the summer with her grandparents to the Atlantic seacoast. They stay at a cottage in a secluded cove, with the sand and surf a short distance from their front porch. A great black-backed seagull, named GG, befriends the girl. They spend the day exploring life on the beach, in the surf and the waves out at sea. With GG's help, the girl meets a host of marine creatures, some very small, some very large. She meets birds and other land animals that live by the seacoast. A fox family enters the beach and one of the kits gets into trouble with a blue crab. A bunch of leatherback sea turtles gorge themselves on jellyfish. Humpback whales arrive on their annual migration north from the Caribbean. She discovers the vastness of the oceans surrounding the earth's surface and the astonishing diversity of plant and animal life. The little girl's exploration of a beach in a small cove on the Atlantic Ocean helps her understand the creation, the beauty and the greatness of our world. She thinks about the God-given duty of all human beings to keep the earth fresh, clean and bountiful for all living and non-living things throughout time.