I went into The Pale Horse without much hope that I would enjoy it - I'm down to the last 8 (now 7) Christie novels, and I'm reserving the ones that I thought would be the best bets for enjoyment to the end.
The Pale Horse was published in 1961, between A Cat Among the Pigeons and The Mirror Crack'd From Side to Side. It's not a book that shows up on the best - or worst - lists of Christie mysteries, so I knew almost nothing about it.
My first pleasant surprise occurred on page 8, when Ariadne Oliver makes an appearance. Fangirrrrrrl moment ensues:
I also had it in my head that this was one of Agatha's rare (and mostly unsuccessful) international thrillers. I was therefore pleasantly surprised that this is just a straight up mystery, and one with a really solid twist, actually.
The mystery itself is both implausible and fairly silly, but that didn't stop me from enjoying it a whole heckuva lot. I liked it better than Destination Unknown, although I still think that They Came from Baghdad was a tiny bit more fun.