ONE OF THE OBSERVER THRILLERS OF THE YEAR: 'GLORIOUS PROSE AND RAZOR-SHARP TENSION' 'LYRICAL AND ACTION-PACKED' Guardian'I COULDN'T TURN THE PAGES FAST ENOUGH' Clare Mackintosh'IMPOSSIBLE TO PUT DOWN, OR FORGET' Sunday Mirror'GLORIOUS DRAMA AND LYRICAL FLAIR Denise Mina, New York TimesTwo friends Wynn and Jack have been best friends since their first day of college, brought together by their