Percy Jackson & the Olympians is a series of fantasy novels written by American author Rick Riordan. The first book series in his Camp Half-Blood Chronicles, the novels are set in a world with the Greek gods in the 21st century. The series follows the protagonist Percy Jackson, a young demigod, who must prevent the Titans, led by Kronos, from destroying the world. The first three books were published in the United States by Miramax Books before it was folded into Hyperion Books; that house published the following three books. All the books were published in the United Kingdom by Penguin Books. Four supplementary books, along with graphic novel versions of the first five books, have also been released. By January 2022 the books had sold more than 180 million copies worldwide, making the series one of the best-selling of all time.[1] Two sequel series, The Heroes of Olympus and The Trials of Apollo, follow. A follow up trilogy in the series, beginning with The Chalice of the Gods, takes place after the events of The Heroes of Olympus and began in 2023. The first book was adapted as a film titled Percy Jackson & the Olympians: The Lightning Thief (2010). It was commercially successful, but received mixed reviews from critics and the audience for its departure from the book. The first book was also adapted into a musical. The second book was adapted as a film titled Percy Jackson: Sea of Monsters (2013), which also received mixed reviews. A TV series based on the novels premiered on Disney+ in 2023 to positive reviews.