"The Perfectionists" is a young adult novel by Sara Shepard, known for her popular series Pretty Little Liars. The story follows a group of five high school girls who strive for perfection in their lives, but their ambitions lead to unexpected consequences when one of them is found dead. As the remaining friends navigate their grief and the pressure to maintain their flawless images, secrets begin to unravel. The novel explores themes of friendship, ambition, and the dark side of striving for perfection, ultimately revealing that not everything is as it seems in their seemingly perfect lives.