What are some thought-provoking books that explore the theme of morality and ethics?

I'm looking for books that tackle complex moral dilemmas and ethical questions, forcing characters and readers alike to confront the gray areas of right and wrong. I recently read "The Good Place: The Complete Philosophy of the Show," which offers fascinating insights into ethical theories through the lens of a comedic narrative. I'm particularly interested in novels that not only engage the mind but also evoke emotional responses, perhaps through characters making tough decisions or navigating morally ambiguous situations. Any recommendations that delve into philosophical themes while still being engaging and thought-provoking would be greatly appreciated!