A real page turner

Definitely in my top five this one, and possibly even number one. Just a perfectly crafted tale. By all accounts it took her 10 years to write, well worth it. And I still haven't got round to touring through Vermont to see if it lives up to the descriptions.

Right no more clues... answers on a postcard please if you know what it is.

Oh yes and it is World Book Day... (thank you for the prompt!!)