Keeper

Keeper by Kathi Appelt

To ten-year-old Keeper the moon is her chance to fix all that has gone wrong ... and so much has gone wrong.
But she know who can make things right again: Maggie Marie her mermaid mother, who swam away when Keeper was just three. A blue moon calls the mermaids to gather at a sandbar, and that's exactly where Keeper is headed- in a small boat. In the middle of the night, with only her dog BD, (best dog) , and a seagull named Captain. When the riptide pulls at the boat, tugging her away from the shore and deep into the rough waters of the Gulf of Mexico , panic sets in and the fairy tales that lured her out there go tumbling into the waves. Maybe the blue moon won't sparkle with mermaids and maybe -- oh no... "Maybe" is just to difficult to bear.

I love the book trailer, it just layers question mark after question mark, and leaves you curious for more.