Feels like Dame Agatha was experimenting with new techniques, namely, how long will the readers wait before letting Hercule come in and solve the story? And of course, a little like Murder on the Orient Express, it's a murder that no one really wants solved. Yet, enter he does, and solves the crime using the techniques of the mind--although he admits he lacks proof. Come to think of it, I don't think he referred to "the little grey cells," alas. While not her best, I nonetheless enjoy the Egyptian setting, the awful dynamics of a very dysfunctional family, and her twist. She blends some "love-at-first-sight" romance here as well, which is perhaps a little eye-rolling.