Tallulah the Mermaid and the Great Lakes Pledge (9781534113176, $18.99) will reach ages 4-8 with its special celebration of Great Lakes creatures, where Tallulah the mermaid will be honored as the Great Lakes Mermaid. She takes the pledge, but finds it involves a learning curve about environmental dangers, natural history, and tasks she must undertake to keep everything connected and healthy. Brooke O’Neill’s appealing drawings of mermaids and animals creates a lively interplay between message and image.