There is not much point in repeating the storyline of this book as every Christie reader knows the story of a horrendous, cruel,terrorising (step)mother and her dysfunctional family. And as this is a Christie, murder must follow . Enter Hercule Poirot, who decides to give Colonel Carbury(a friend of Colonel Race) a helping hand and solve this crime.
I remember reading it as a young creature and thinking,Petra,wow,it seemed so far away,both in distance as in atmosphere. When years later,I finally visited Petra I was, apart from being mightily impressed, overcome by an acute attack of Christie nostalgia.
How fabulous it must have been,travelling in a small group,sleeping in a cave,having diner overlooking those red,orange and of course, pink cliffs and gazing upon this historical and mythical wonder in the sunset.
This was written in 1938 and it is still highly readable(of course our attitude towards"servants" and the original inhabitants has changed, although not all that much...) but notwithstanding this,and a very soppy epilogue, it is always such good fun reading Agatha Christie.