The Raspberry Room, livre ebook

In behind the raspberry bushes is a special place, a place Abby doesn't trust to just anyone. Then she looks through a knothole in the fence and right into a blue, blue eye. A toy tractor appears on her side of the fence and she pokes her little brother's stuffed blue monkey into the hole. The next morning she finds it with its tail ripped off. Who does the blue eye belong to?