I had read some of these stories about 50 years ago, but had forgotten about Parker Pyne. I've never had much patience with Poirot, I think Agatha Christie called him an ego-centric creep. Who am I to argue? Miss Marple always reminded me of my grandmother, they were very similar in many ways. So, I always liked those. But, there aren't many of them and the formula was wearing a bit thin even then. Parker Pyne is very different to Poirot and Marple. He is not a detective. Rather he solves people's problems, ranging from the mundane to the exotic, often in very unlikely ways - but always believable. Christie clearly liked him best of all her creations; the character is more fully-developed, the plots more thoughtful, and the writing - the writing. For the first time, I see Christie as a serious writer, capable of handling emotion, relationships, and humour, and of setting a scene.
It's wonderful to have all the Parker Pyne short-stories in one volume. They are variously clever, witty, pathetic (in the true sense of the word), heart-warming, and hugely entertaining. After reading these, you will come away feeling a bit better about life. What more could you want from a book?