Janet Radcliffe-Richards writes (and talks) on morality with tremendous clarity. This book is accessible to just about anyone. It lacks unexplained jargon and gets to the core points succinctly and elegantly.
And, I believe, she has a habit of being right. This is applied ethics. However, it requires explaining the general shortcoming on how we tend to form moral beliefs based on instinctive feelings. With careful thought, we might realise that these instincts are not faultless morality-detectors. While we put too much trust in them and are unwilling to reason, people suffer and die unnecessarily.