Harry staggered back - the tree had moved. In wave of horror, he understood what he was seeing. The 'tree' was a huge, fur-covered leg. He stared up into a huge, distorted, almost-human face. A great paw the size of an automobile swooped down. He had found the Amok, and the first thing to do was to get himself and Purity out of danger. But the beast had vanished. And so had the girl.