The After Series Collection by Anna Todd includes the novels After, After We Collided, After We Fell, After Ever Happy, and companion books. The series follows Tessa Young, a hardworking college student, and Hardin Scott, a rebellious and troubled young man. Their intense relationship is marked by passion, misunderstandings, personal growth, heartbreak, and reconciliation. The story explores love, identity, family issues, and the challenges of growing up.