Elidor by Alan Garner.
 
In this, his newest book, the contemporary nature of the story is even greater than in the first two. Four ordinary children living in Manchester are suddenly and seemingly inexplicably thrown up against forces far stronger than any ever conceived by a writer of science fiction.
The originality of the story and the power of its telling sweep the reader along from the first page to the last, and Charles Keeping's drawings perfectly complement the narrative.
 
It is a book that to describe would give away its secrets. It demands to be read.
Illustrated by Charles Keeping