Hickory Dickory Dock by Agatha Christie 217 pages

When Miss Lemon, Hercule Poirot's nearly infallible secretary, makes three mistakes on one letter, Poirot knows there must be something terribly wrong.  It seems Miss Lemon's sister, the equally efficient Mrs. Hubbard, is experiencing strange happenings at the youth hostel where she is employed.  A nonsensical string of seemingly unrelated events (thefts and destruction of property) fill her with unease.  Poirot realizes that sorting it all out is really the only way to get his virtually perfect secretary back on her game.  Shortly after he gets involved, however, a murder occurs...and then another.  Someone is desperately trying to hide secrets. Can Poirot sort it out and catch the killer?
This was an audio book read by Hugh Fraser, who plays Hastings on the A&E mystery series Poirot.  

Dead Man's Folly by Agatha Christie 230 pages

Ariadne Oliver, the well-known mystery authoress, calls her friend Poirot to come assist with a murder hunt she's planning.  The planning is all done, but she has a foreboding that something is just not right.  She says it's as though she's being pointed to add things to her hunt that wouldn't have been there otherwise.  Poirot comes to the village, meets the cast of characters (the residents of the house) and prepares to enjoy himself at the fete.  Everything seems to be going as planned until the play murder hunt turns into the real thing.  Now Poirot has to sort out what matters and what doesn't to solve a very sinister and devious string of murders.  I listened to this classic by Agatha Christie.  It was read by David Suchet, who plays Poirot in the A&E adaptations of these novels.  It was very enjoyable.