for Amelia Fang and the Memory Thief by Laura Ellen Anderson
Amelia and her friends are taking part in a competition to visit Pumpkin Paradise Park - the most bloodcurding theme park ever! All they have to do is sell as many cookies as possible.
But the creatures of Nocturnia have begun to act stranger than usual . . . no one can seem to remember anything - including their own names or even Amelia's big birthnight party! Where have everyone's memories gone? And how can Amelia save them when they have all forgotten who she is?