Hannah loves her vacation by the seashore, but she wishes she had somebody to play with. When she finds a message in a bottle from a mermaid, Hannah writes back--and soon she and Shelly become friends. Shelly has lost a favorite bracelet, but soon discovers a map that leads Hannah to a special treasure box--and another new friend! This charming book with a padded glittery cover includes 7 envelopes and 8 notes, a map, and a 3-D treasure box, plus a sea star charm bracelet!