This is one of Christie's most enjoyable novels. Written from the point of view of Amy Leatheran, a competent and no-nonsense nurse, who travels to Baghdad with a mother and her infant and is due to return to England when she is offered another job. Dr Leidner is an archeologist and recently there has been a certain uncomfortable atmosphere at the dig where he is working. His beautiful wife Louise has 'fancies' and, as Amy is keen to see more of the country, she is engaged to look after her. Indeed, when Amy does reach the dig, she finds the group are a shade too formal with each other and it soon transpires that Louise is nervous for a reason, "I'm afraid of being killed..."
Of course, Christie's second husband was an archeologist and, as she accompanied him often, there is an air of authenticity about this novel which gives the book real flavour. Although I agree with other reviewers that it is almost impossible to solve the murder, it is best to simply sit back and enjoy this excellent novel. When murder does occur the local police call in an expert that is passing through - a certain M. Poirot. At first Amy thinks it is unlikely Poirot can help, finding him comical. However, by the end she realises how she has underestimated him and his chilling words, "murder becomes a habit" become prophetic. Overall, this is an excellent mystery and one of Poirot's most brilliant cases.