it's a long shot...
DD says it's about a boy who stays with relatives for the summer. He meets someone called Hunter who lives in a big house on a hill near the same village. The boy goes into Hunter's shed and it's like a maze and on the other side of the maze there's a magical world with elves and goblins and stuff.
The book cover has got silouettes of houses and trees against an orange sky.
If you get this then truly mn is awesome