It’s doubtless a result of the generation I’m from that when I think about fictional murderers wearing distinctive costumes the first jump my mind makes is to the Ghostface killers of Wes Craven’s Scream films. If you’re a little older than me, you may go for Freddy Krueger’s striped jumper, and if you’re younger than me I have no idea what you might pick because I have lost track of whatever passes for popular culture these days, but for me it’s Ghostface.
Simple criteria: novels only, readily available, not conceived in the fertile ground of John Dickson Carr’s imagination. I’ve also restricted the impossible crime to being the comission of the murder – people stabbed or shot while alone in a room, effectively – more to help reduce the possible contenders than anything else. Several stone cold classics are absent through the inclusion of other invisible events but that’s a future list (or five…).
Carr – doyen of the impossible crime, responsible for more brilliant work in this subgenre than any other three authors combined – will eventually get his own list (or five…), I just have to figure out how to separate them out; restricting it to five novels was hard enough for this list, but if you’re looking to get started in locked room murders these would be my suggestions: