The interviewers ask about the last book you read for pleasure because they want to know more about your hobbies and interests outside of medicine. They understand that being well-rounded is important for success in the medical field and want to see if you have a passion for learning and personal growth. It also gives them an idea of how you spend your free time and if you prioritize self-care and relaxation, which is essential for maintaining a healthy work-life balance. So, it's important to be honest and genuine when answering this question and use it as an opportunity to showcase your unique personality and interests. However, you want to avoid mentioning a book that may be offensive to any of the interviewers, so you will need to walk a fine line when responding.