I haven't started reading yet, but I bet it's worth a look if you liked the book, which I did.
ETA - here is a fine quote from Susannah Clark
"I’m with Alan Garner: the landscape of England (particularly Northern England) is the bit of magic we can actually see and touch for ourselves"
I guess everyone feels this about their native land, but I do feel an immanence of magical power in the English landscape, and I admire Alan Garner for the way he portrays it.