This is a spoiler-free post.

The Hollow was first published in 1946, during Agatha Christie’s Golden Age. It’s not one of her more well-known mysteries, which I always thought was a bit strange, because it’s my favourite Christie. On the surface the plot is typical for her: A murder in a stately home where several guests have gathered for the weekend. Hercule Poirot investigates. Personally I think this book is rather invisible because it belies a very common statement about Christie, that she only writes cardboard stock characters with no depths and complexity. In The Hollow we have plenty of complex characters and I would say the main theme in the book is obsession. Obsessive love, obsession for science, the artist's obsession towards their work, and so on. If you wanted a stock Christie, you may be disappointed. There is also the fact that even if this is a Poirot novel, he doesn’t enter until halfway, and he is actually not the first to figure out who the murderer is. In fact I’ve always felt this book may have been better liked if there had been no Poirot in it at all. Checking the publishing order, this was the first Poirot since 1942, and Christie had written five books in between. I wonder if the publisher put pressure on her to include Poirot in this one… You also get the POV from more characters than usual. I have never read any of Christie's Mary Westmacott novels, but I’ve read that The Hollow is more like them in writing style.