The Judas Window by John Dickson Carr (writing as Carter Dickson).
One of the five best locked room mysteries, as selected by 14 established mystery authors and critics (All But Impossible!, 1981. ed. E. Hoch).
The Case:...
XMAS MARKS THE PLOT Twelve Christmas mysteries — gift wrapped in entertainment and suspense — ready to take home for the holidays in this delightful collection selected from Alfred Hitchcock’s Mystery Magazine and Ellery Queen’s Mystery...