I finally got around to Piranesi by Susanna Clarke three days ago and finished yesterday. I read in short bursts, as I've been a bit distractible as of late. The story is part fantasy, part ontological mystery, whole genius. I really recommend this book, especially if you're a C.S. Lewis fan; there are several references to his Narnia book, The Magician's Nephew.
I've posted a thread about atypical fantasy novels; I think this belongs there. It's about a man going by the name Piranesi who resides in a world consisting of an infinitely spacious house full of statues and water. This is the only world of which he's aware. His only company is a man he calls The Other. They meet every now and then to perform magic rituals. One day, a third person arrives, upending everything Piranesi knows and believes. It's a bit short, so I won't say more. Please read.