I'm having a ball plowing through John Dickson Carr/Carter Dickson works - trying (in vain) to outguess Dr. Fell or Sir Henry Merrivale. I thought I finally had it while reading "The Problem of the Green Capsule" - but no, out-foxed again. And I was so sure!
These golden "locked-room" & "impossible murder" mysteries hold up very well and provide stimulating reading today.