John Michael Green is an American author, YouTuber, podcaster, and philanthropist. His books have more than 50 million copies in print worldwide, including The Fault in Our Stars (2012), which is one of the best-selling books of all time. Green's rapid rise to fame and idiosyncratic voice are credited with creating a major shift in the young adult fiction market. Green is also well known for his work in online video, most notably his YouTube ventures with his brother Hank Green.

The Fault in Our Stars is a novel by John Green. It is his fourth solo novel, and sixth novel overall. It was published on January 10, 2012. The title is inspired by Act 1, Scene 2 of Shakespeare's play Julius Caesar, in which the nobleman Cassius says to Brutus: "Men at some time were masters of their fates, / The fault, dear Brutus, is not in our stars, / But in ourselves, that we are underlings." The story is narrated by Hazel Grace Lancaster, a 16-year-old girl with thyroid cancer that has affected her lungs. Hazel is forced by her parents to attend a support group where she subsequently meets and falls in love with 17-year-old Augustus Waters, an ex-basketball player, amputee, and survivor of osteosarcoma.