You could try Elsewhere by Gabrielle Zevin; it's a really original, interesting book. I think she's won a couple of awards, but I'm not sure which ones.
You might also like Alice Sebold, she's wrote a couple of really amazing books, The Lovely Bones being my favourite. She has won the American Booksellers Association Book of the Year Award for Adult Fiction and the Bram Stoker Award for First Novel.
http://www.amazon.co.uk/Lovely-Bones-Alice-Sebold/dp/0330485385/ref=sr_1_1?ie=UTF8&qid=1248421455&sr=8-1
http://www.amazon.co.uk/Elsewhere-Gabrielle-Zevin/dp/074757720X/ref=sr_1_1?ie=UTF8&qid=1248421480&sr=8-1