Thriller set of 2 novels

In the ballad of the running Man, to English teachers on holidays find the mutilated corpse of a man. Made into a movie called the running man. The party at number five is about a destructive dynamic between two women. And is a psychological thriller ***new to poshmark? Use the referral code mybooknook on signup to get a $15 credit towards your first purchase*** LRcubbyfront0723