It's only the afternoon, but dusk is already falling and a log fire burning in the grate. Outside, frost coats the tree branches and snow sparkles on the ground. And somewhere in the darkness, a murderer is making plans. Here are ten classic crime stories for the winter months, from the greatest minds of the mystery genre. So bundle up, grab a glass of mulled wine, and get ready to be puzzled, astonished and entertained by these festive stories of murder and mayhem.