Slade House

People keep disappearing every 9 years. The mysterious Slade House only shows up every 9 years. The story revolves around a pair of twins who seem to be immortal and people that are drawn to the iron door of Slade House or are looking for the door to it. But then are never seen again.
This was a strange book but it moved along quite nicely. I had previously read Cloud Atlas and it dragged so I was not sure I wanted to read this. But I am glad I was wrong.