This first novel by Tom Rachman, a London-born journalist who has lived and worked all over the world, is so good I had to read it twice simply to figure out how he pulled it off. I still haven’t answered that question, nor do I know how someone so young — Rachman turns out to be 35, though he looks even younger in his author photo — could have acquired such a precocious grasp of human foibles. The novel is alternately hilarious and heart-wrenching, and it’s assembled like a Rubik’s Cube. I almost feel sorry for Rachman, because a debut of this order sets the bar so high.