The Doom Stone
Paul Zindel

This book is Science Fiction/Horror.
The story is set near Stonehenge. In the first part a man is driving a boy to where he is staying. The car was just going past Stonehenge,
when the boy saw a man running towards the car, and a shadowy figure was following close behind him.
The shadow figure whacked into the man's back and then went flying towards the ground.
I recommend this book because it has some really exciting and scary parts in it.