I think Agatha Christie let her hair down with this one and had fun. It's not a whodunnit, just a thriller/adventure, with a lot of humour. I enjoy it every time. I have to keep reminding myself that the book was published in 1922 and the "roaring twenties" were just beginning. There's a photo of my grandmother as a young woman, that must have been taken maybe a few years before and she definitely doesn't look like the liberated woman Tuppence is. She has a long coat and a big-brimmed hat and I think her dress, under the coat, must have been just above her ankles at best. What a difference a few years made!
One thing I wonder is - why didn't Alfred Hitchcock turn The Secret Adversary into a movie? It would have made a great Hitchcock!
What do you think?