There must be a victim. A suspect. A detective. The rest is just shuffling the sequence. Expanding the permutations. Grant McAllister, a professor of mathematics, once sat down and worked them all out – calculating the different orders and possibilities of a mystery into seven perfect detective stories he quietly published. But that was thirty years ago. Now Grant lives in seclusion on a remote Mediterranean island, counting the rest of his days.Until Julia Hart, a sharp, ambitious editor knocks on his door. Julia wishes to republish his book, and together they must revisit those old stories: an author hiding from his past, and an editor, keen to understand it.But there are things in the stories that don’t add up. Inconsistencies left by Grant that a sharp-eyed editor begins to suspect are more than mistakes. They may be clues, and Julia finds herself with a mystery of her own to solve.

    23 has a secret. In this bedsit-riddled south London wreck, lorded over by a lecherous landlord, something waits to be discovered. Yet all six residents have something to hide.Collette and Cher are on the run; Thomas is a reluctant loner; while a gorgeous Iranian asylum seeker and a 'quiet man' nobody sees try to stay hidden. And watching over them all is Vesta - or so she thinks. In the dead of night, a terrible accident pushes the neighbours into an uneasy alliance. But one of them is a killer, expertly hiding their pastime, all the while closing in on their next victim...As a cloying heatwave suffocates the city, events build to an electrifying climax in this dark, original and irresistibly compelling thriller.