Thrillers are characterized by suspense, action, and heroes thwarting more powerful villains through resourcefulness. While often involving murder or kidnapping, thrillers encompass many genres including legal, spy, action-adventure, medical, police, romantic, historical, political, religious, and high-tech stories. What unites them is the intense emotions they create, such as apprehension and exhilaration. Different thriller types feature varying themes depending on their genre, for example psychological thrillers focus more on mind games than action sequences.