I really liked this story. There were different characters. And as always only Agatha Christie does, there were many suspects. But these people had an interest in each other. Because they thought each other had murdered their mother.
I found myself not liking Calgary. For some reason he had to make sure he solved this case. Even though he was no detective. But knowing that he thought he had good news to give the Argyle family. But the news wasn't taken as such. "Jack Argyle was innocent". For whatever reason Calgary had to put the pieces together. He must do what had to be done and forget after that. I found myself saying "stay out of it".
Who killed Mrs. Argyle? Her kids that she adopted from bad situations they were in? Playing the good person for better. Or was it her husband? Or maybe the housekeeper? And then you have Philip Durrant. Husband of Mary. Another amateur detective. In this case he was found the same way as Mrs. Argyle.
Different brothers and sisters that found comfort in one another. At least two anyway.
It all comes down to Arthur Calgary figures out the pieces and with the permission and help from Superintendent Huish.
Not the guilty who matter, it's the innocent. At times people forget the innocent can be forgotten. And they are of need of help. It's tougher on them.
The ending surprised me. Between Hester and Arthur Calgary. Hester so unsure of herself, so wild. Calgary really never liked her. Or thought she was too off center. And Calgary a matured man. Find themselves in an understanding. I thought they would never see eye to eye.