Various , Agatha Christie , Desmond Bagley , G.K. Chesterton , Peter Robinson , Peter James , Elly Griffiths , Alexander McCall Smith , Sophie Hannah , Dorothy L. Sayers , John le Carré , Martin Edwards , Val McDermid , Ann Cleeves , Ian Rankin , John Dickson Carr , Andrew Taylor , Stella Duffy , H.R.F. Keating , Malk Williams , Joan Walker