The Heroes of Olympus

The Heroes of Olympus is a series of five adventure and fantasy novels written by Rick Riordan, an American author. It follows the "Percy Jackson &amp; the Olympians" series and is followed by "The Trials of Apollo" series and the Daughter of the Deep. The stories are based around Greek and Roman mythology, it describes the efforts of seven demigod heroes to prevent the earth goddess Gaea from waking up with their ship called Argo ll. The first book in the series was released on October 12, 2012 and the last one was released on October 7, 2014.
The series begins with "The Lost Hero," and ends with "The Blood of Olympus". Some characters from the "Percy Jackson &amp; the Olympians" series return, including Percy Jackson, Annabeth Chase, Clarisse, Chiron, Camp Half-Blood campers, and several others. There are also some new characters. Some are Leo Valdez, son of Hephaestus, Jason Grace, son of Jupiter (Zeus as a Roman) and Piper McLean daughter of Aphrodite and movie star Tristan McLean who is kidnapped in "The Lost Hero".
Riordan based some of his series on "The Golden Fleece and The Heroes Who Lived Before Achilles" by Padraic Colum.
Books in the series.
In addition to these books, Rick Riordan has also written a supplementary book named "The Demigod Diaries" which was released on August 14, 2012.
References.
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