Off we go!!!
I don't have high hopes for this one. For one, I have always viewed this one as the practice piece for Murder on the Orient Express (which is a favourite of mine) and, second, Dama Agatha hated this one, too:
No book, I said, was exactly as I wanted it to be, and I was never quite satisfied with it, but if I thought a book I had written was really bad I should not publish it. However, I have come near it, I think, in The Mystery of the Blue Train. Each time I read it again, I think it commonplace, full of cliches, with an uninteresting plot. Many people, I am sorry to say, like it. Authors are always said to be no judge of their own books.
Agatha Christie - An Autobiography