My favourite book is Jonathan Strange & Mr. Norrel by Susanna Clarke. On @AmandaB’s recommendation thread ( Need book/TV recommendations for completed series ), @zarf mentioned Piranesi, Susanna Clarke’s second book, which I didn’t know existed.
I walked into the library today and it was there.
I read the first chapter and I am shaking my head in flabbergasted bewilderment. In a very good way.