The Cassie Hobbes Series is a young adult thriller series written by author Jennifer Lynn Barnes. It follows the story of Cassie Hobbes, a teenager with a unique ability to read people's emotions and intentions. Cassie is recruited by a secretive FBI program that trains gifted teens to help solve crimes, particularly those involving serial killers. Throughout the series, Cassie and her friends, known as the Naturals, use their skills to unravel complex cases. The series explores themes of friendship, trust, and the moral dilemmas faced by those who possess extraordinary abilities. Each book presents new challenges and deeper insights into the characters' backgrounds and motivations.