I have finished reading 2 of Agatha Christie's books back to back - Murder in Mesapotamia and The Mystery of the Blue Train. It was sheer fun! In both cases, it was only when I reached the last few pages that I had a first faint glimmer of who the murderer could be. Of course, in one case I was miles away from figuring out how the murder could have been done. And in the other, I couldn't, for the life of me, guess the motive. The way she ties up all loose ends finally is simply brilliant!