Karen's Mermaid (Baby-Sitters Little Sister, No.52)
By Ann M. Martin.
Description
While visiting Sea City, Karen tries to bring a bossy girl down a peg by bragging that she saw a real live mermaid in the ocean, until a note from a real mermaid arrives, asking Karen to be her friend. - from Amzon
ISBN(s)
0590482998, 9780590482998