For you and your 9-12 year olds. Brenna and the Horses of Lusayana is a fantasy adventure by Lee Landes.
Brenna MacLean (12) has no home, no friends and no father. It's always been like that and her Mum isn't telling her why? Summer: and a stranger called Cosmo lures them to a cottage suspended above a wild and threatening sea. Immediately, Brenna's beautiful Mum begins to fade away. Following the clues Cosmo has left her, Brenna meets the White Horses of Lusayana who give her their protection and the chance to break the curse on her family. Accompanied by her new friend Louis, a boy born to fight evil, Brenna tries to uncover the secret history of the curse but evil acts linger in the World and soon Brenna and Louis are fleeing for their lives, battling the Black Horses from the deep, and endangering the White Pony, Neima, who has been sent to help them.
And seeing as the thread has gone to the dogs - you might as well know that Orion the pathfinding spaniel is in it too.