Locked room mysteries, claims Otto the Editor, are "the ultimate manifestation of the cerebral detective story". These 68 examples range across crimes from poisoning to perforation; guns to grudges; broodings to bludgeonings.
Sometimes the setting is literally a locked room/flat/house. At other times it's a more metaphorical setting: a sandwich board; a summerhouse; an unmarked snowbank; an untouched field. In each case, we progress from the impossible puzzle to the inevitable solution, which as Penzler concedes, carries a risk of disappointment. However, it's not the arrivals but the journeys which matter.
We start with Poe's 170-year-old, fourth-floor killings in the Rue Morgue (how long since a thriller writer felt able to pause and discuss Greek philosophers?), and Jacque Futrelle's The Problem of Cell 13, originally published as a serial with a prize for anybody who solved the riddle. Someone did, the killjoy.
We end 900 tightly-printed pages later with Martin Edwards' 21st century spouse-smearing plan gone awry, Waiting for Godstow. Yes, nifty title.
A less nifty title, The Locked Room To End Locked Rooms, by Stephen Barr, grumbles at the genre, then exploits it to bisect an utter cad with an axe, in a house which is not merely locked, but bolted and sealed.