A famous singer and a secret agent named Winter and Sydney are on a mission to prevent terrorists from obtaining a dangerous biochemical weapon. The book is called Stars and Smoke, which is a pretty cool title! Both characters are 19 years old and attractive. Winter's beauty is mentioned a lot in the story, which can get a bit overwhelming. Despite that, the characters are young, skilled, and of course, they fall in love. Unlike Marie Lu's other books, Stars and Smoke is set in modern-day London and lacks extensive world-building. The action-packed plot makes it feel like a romantic comedy action movie. Even though the mission may not be entirely realistic, the focus on action over romance is a plus. The characters are not too annoying, the dialogue is believable, and the suspense is well done. This clean novel is suitable for teenagers. Overall, as a young adult book, it's quite enjoyable!