The Dinner Guest was one novel that I gobbled up, in one serving!  Just when you think you’ve read all there is in the thriller genre along comes this beauty and smacks you upside the head.  The perfect couple trope on drugs.  Uniqueness.  An impending threat.  Twists by the bucketload.  If you think you have this one figured out be prepared for a grenade to literally blow your face to shreds.  Walter lies in wait for the perfect moment then hits you straight between the eyes for a killer blow.  Set in the super rich areas of London.  It sets the scene.  Things are about to be rocked to its…