Name That Locked Room

I am currently fascinated with locked room mysteries thanks to Jonathan Creek and John Dickson Carr. For those of you who love them, too, give me some great locked room titles, please. And thank you very much.

(Yes, I'm exploiting you all again. Some day I'll write a real blog post, but I feel this is your own fault. You've become legendary on the internet for solving any problem. You don't want me to exploit you, stop being so damn good at answers. Thank you.)

Oh, and speaking of locked rooms, Madeline's still in the tomb over on the Cherry Forums Gothic Book Club where we're discussing the merits of getting rid of guilt through live burial.