Objectively speaking I think Winterhouse is a good book and I know a number of people who love it, but unfortunately it just wasn't for me. The plot just didn't really appeal to me, and I also don't like spooky stories and this has more than a touch of spookiness. 

I do think the book is well written, and I enjoyed the puzzles scattered throughout. The narration of the audiobook was excellent, and the  hardcover edition of the book is truly beautiful, with an illustrated hidden cover glimpsed through windows in the dustjacket. 

Many people will love this book, sadly I'm just not one of them!