Yes, it's a weird work if you look at the plausibility of the story. But it is not so bad as to say implausible and difficult to imagine. Especially people like myself, who is used to reading sci-fiction novels.

It contains many short stories, with Father Brown as the protagonist. His character very much reminds one of Hercule Poirot of Agatha Christie books. In fact, I think, Agatha Christie must have been inspired by Father Brown. The reason why I enjoyed this very much must also be related to this apparent relation to Agatha Christie books, with the advantage that very few pages have to be read to get to the 'Solution to the Mystery'. If you are a fan of really intriguing detective-fiction, not the Sherlock Holmes type where you are taken for a long action packed investigation, but of the more sedentary and contemplating type, akin to H.P., you'll like this.