The book talks about how
(Spoilers)
A family managed to ruin a woman’s life and end up making her commit suicide. Then, they realise whatever mistakes they have done.
Big character development, and honestly better than those teenager mystery stories.
The inspector helps to make the story more intense and mysterious, since in the end we, the reader are not shown more about him.
It basically just talks about how being a jerk to others can cause someone to fall to rock-bottom.
Tdlr, if you don’t like this book, go and read Agatha Christie.
(Recommending Death On The Nile.)