The Golden Moonbeam — Angela James

It is a full moon on the summer solstice, a time of powerful magic and when Mailliw breaks his sister's moondial, she becomes desperately ill. The doctors have no cure and Mailliw only has two weeks before his sister disappears from their world.

As she starts to fade, his quest to find a cure begins, but magic alone is not enough He needs help from friends, dragons and a vampire cat to face a carnivorous swamp, an icy kingdom and deal with a terrible old hag where truth has sinister complications...