Marple-Poirot-Holmes Challenge

This challenge is right up my (Tami's) alley. I have been a Christie fan since high school but haven't read any recently, so when I ran across this challenge on http://atpemberly.com I saw it as the perfect incentive to get back to the classic mysteries. I'm not as familiar with the Holmes stories - I've only read a few, but look forward to exploring them, also. Thanks to Kals for sponsoring this challenge.