The Stone Crown is a debut fantasy book by Malcolm Walker (click here to visit his website). This book was published by Walker Books.
Here's a description of The Stone Crown from the publisher's website:
Emlyn and Maxineare both newcomers, both misfits in their own way. But their lives are linked and their paths destined to cross in ways that neither can begin to imagine. Drawn to the ancient site known as Sleeper's Spinney, Emlyn and Maxine unleash an unearthly power when they unwittingly remove one of a group of wooden horsemen hidden beneath the earth. Containing the trapped spirits of Arthur and his men, the carvings have been held in check since the Dark Ages by a long line of Keepers, the McCrossans. With the Keepers prepared to stop at nothing to recover what has been stolen, Emlyn and Maxine are drawn into a parallel world of myth, magic and the supernatural. Arthur is awake – and he is no revered, grey-bearded king come back to save the Isles. Its thrilling climax sees a race against time as Emlyn and Maxine try to destroy the figures before Arthur and his guard are let loose and released into the world of twenty-first century Scotland.
And here's Risingshadow.net's review of this book.