Book review: Slade House

Slade House started life as a Twitter story that Cloud Atlas author David Mitchell wrote in 140 character bursts, picking up on a strand first formulated in The Bone Clocks, his 2014 Man Booker longlisted blockbuster.
He ran with it, turning a Twitter tale into a sinister yarn that begins innocently enough — a musical mother and her nerdy son visit a rather grand residence by the name of Slade — and then drags you into a mysterious, fog-strewn house that neither you, nor its guests, can escape.