Lagercrantz neatly intertwines the facts of Turing's life with the fiction of Corell's quest for knowledge to create an unsettling story of state secrets and sexual hypocrisy -- Nick Rennison * Sunday Times *Swedish crime fiction moves into Britain's heartland in this superbly written espionage and murder novel . . . Lagercrantz has the lingo, the mood and the place down pat. -- Margaret Cannon * Globe and Mail (Toronto) *Has the faintest whiff of W.G. Sebald; haunted characters determined to pull others down into turbid, oppressive currents of memory and ideas. You are willingly drawn down with them -- Sinclair McKay * Spectator *A persuasive evocation of Turing's genius and of a Britain still suffering under rationing and repression -- Harry Ritchie * Daily Mail *Perhaps the most signal achievement here is the clever melding of two narrative forms: a sympathetic biography of a real historical figure treated appallingly by the establishment, and a police procedural in which a dogged copper tries to crack a mystery in the teeth of bloody-minded intransigence -- Barry Forshaw * Independent *Absorbing . . . Gets the synapses sparking . . . Lagercrantz is at home with a damaged hero who has more of an affinity with computers than humans -- Jake Kerridge * Sunday Telegraph *