I was a big fan of David Mitchell.   I thought Cloud Atlas, Black Swan Green and The Thousand Autumns of Jacob de Zoet were excellent.  I thought The Bone Clocks was interesting but weird.  His newest novel is weird but not interesting.  So as not to give anything away to those who want to read it, Slade House is about twins, Jonah and Norah Grayer, who every nine years need to prey on an unsuspecting citizen to continue their lives of immortality.  Each chapter is devoted to a different victim, and since each character is not delved into, I found it hard to empathize with anyone in this strange, unrealistic, read.