When Ariel is bored one day and her friends can't think of anything to do, she decides to send a message in a bottle. Ariel's new pen pal lives in a colorful, exciting place, but Sebastian is suspicious. Ariel learns a lesson about safety when her new friend invites her to visit.
My mom recently re-gave me the Little Mermaid Treasure Chest book collection she had been saving in the attic. I remember loving this book series as a kid. A fun/adventurous one! Ariel writes a letter - sends it in a bottle. Gets a message back - turns out it's Ursula trying to harm her/convince her that her island is better. Very good.