The Fault in Our Stars is a young adult novel written by John Green. It tells the story of Hazel Grace Lancaster, a sixteen-year-old cancer patient, who falls in love with Augustus Waters, a fellow cancer survivor she meets at a support group. The book explores themes of love, loss, and the meaning of life. It became a worldwide phenomenon, topping bestseller lists and receiving numerous awards. The novel was also adapted into a successful film that touched the hearts of millions.