The "Times Literary Supplement" on 14 April 1932, stated that the "actual solution is quite unusually ingenious, and well up to the standard of Mrs. Christie's best stories. Everything is perfectly fair, and it is possible to guess the solution of the puzzle fairly early in the book, though it is certainly not easy." The review further opined that, "This is certainly one of those detective stories which is pure puzzle, without any ornament or irrelevant interest in character. Poirot and his faithful Captain Hastings are characters whom one is glad to meet again, and they are the most lively in the book, but even they are little more than pawns in this problem. But the plot is arranged with almost mathematical neatness, and that is all that one wants."