Happy Sad (Blue Bananas)
By Pippa Goodhart.
Description
A young boy, Toby, finds a little mermaid and takes her home with him, but she is sad and homesick and he can't make her happy. Finally Toby decides to take her back to the ocean, but can't agree to stay with her. - from Amzon
ISBN(s)
0749733365, 9780749733360