The Riordanverse is a fictional universe created by American author Rick Riordan that takes place on a version of Earth where every mythology is assumed to be simultaneosuly true. The Riordanverse primarily focuses on aspects of Greek mythology, Roman mythology, Egyptian mythology, Norse mythology, and—most recently—Celtic mythology. There are other spin-offs provided by other authors, featured under the imprint Rick Riordan Presents, that tackle other mythologies. Of these Rick Riordan Presents spin-offs, the most popular series are about Hindu mythology and Korean mythology.

The Riordanverse is one of the most influential fictional timelines in contemporary literature. The first book series to take place in the universe, Percy Jackson & the Olympians, has sold over 180 million copies worldwide as of 2021. The series has movie adaptations of the first two books and a work-in-progress televesion adaptation for Disney+. After the success of Percy Jackson & the Olympians, two direct sequel series were released: The Heroes of Olympus and The Trials of Apollo. Two spin-off series, The Kane Chronicles and Magnus Chase and the Gods of Asgard, have also been released, the former of which has a movie adaptation deal with Netflix. Under the aforementioned Rick Riordan Presents imprint, the Pandava Quintet has become popular enough to earn a movie adaptation deal.

Second Titan War[change | change source]

Second Titan War
Date	August 2005–August 2009 (4 years)
Location	North America, primarily in the United States and the Caribbean
Result	Olympian victory
Belligerents
Olympus; Camp Half-Blood; Council of Cloven Elders; Party Ponies; Hunters of Artemis; Atlantis Camp Jupiter	Titan Army
Commanders and leaders
Zeus; Poseidon; Hades; Percy Jackson; Annabeth Chase; Grover Underwood Jason Grace; Reyna Ramírez-Arellano	Kronos †; Atlas (POW); Prometheus ; Hyperion †; Typhon †; Krios †; Luke Castellan †; Ethan Nakamura †
Casualties and losses
Hundreds	Hundreds

The Second Titan War was a mythological war in the United States and the Caribbean fought between forces loyal to Olympus and forces loyal to Kronos. The war started in 2005 and ended in 2009. The war erupted after Luke Castellan betrayed Camp Half-Blood and attempted to kill Percy Jackson. After various battles and quests across North America, the war culminated with the Battle of Manhattan. The battle resulted in a decisive victory for the Olympians as Kronos was killed by a redeemed Luke Castellan and the Greek gods implemented major reforms to appease Hades and minor deities. The remnants of the Titan Army were defeated in San Francisco by Camp Jupiter.