Emily Arsenault’s thriller “All the Pretty Things” takes place in a summertime theme park. The main character of the tale is Ivy, whose summer is turned upside down when her best friend Morgan finds the body of Ethan, a former classmate and coworker. Ivy decides to find out the truth about Ethan’s death as Morgan is being sent to a mental health facility, which leads her to disturbing revelations and sinister secrets.