A crime thriller is a genre of fiction that involves suspenseful and action-filled stories centered around criminal activities, police investigations or both. These types of novels or films often focus on the pursuit of justice, the battle between good and evil, and the psychological drama of the characters involved in the storyline. The main goal is to keep readers engaged with a fast-paced plot that involves danger, intrigue, and suspense as it leads up to a dramatic climax or resolution.