The Demigod Diaries

The Heroes of Olympus: The Demigod Diaries is to be released August 14, 2012 and is the companion book to the one of the main series The Heroes of Olympus. Rick Riordan officially announced the book on January 9th, 2012 on his blog. His son Haley Riordan has written a story in the book.

Description
"What dangers do runaway demigods Luke and Thalia face on their way to Camp Half-Blood? Are Percy and Annabeth up to the task of rescuing stolen goods from a fire-breathing giant who doesn't take kindly to intruders? How exactly are Leo, Piper, and Jason supposed to find a runaway table, dodge a band of party-loving Maenads (who just might be a little psychotic), and stave off a massive explosion...all in one hour or less?

"With his trademark wit and creativity, Rick Riordan answers these questions and more in three never-before-seen short stories that provide vital back-story to the Heroes of Olympus and Percy Jackson books. Original art, enlightening character interviews and illustrated profiles, puzzles, and a quiz add to the fun in this action-packed collection that is sure to delight legions of loyal fans."

Stories

 * A story from Luke Castellan's point of view, from the days when he adventured with Thalia and Annabeth.
 * A classic first-person Percy Jackson story, the first Rick Riordan has written since The Last Olympian. In this adventure, Annabeth and Percy's date is interrupted by the god Hermes, whose staff has been stolen by a fire-breathing giant. This cannot be good...
 * A Leo Valdez story, set at Camp Half-Blood. As Leo builds the Argo II, something goes terribly wrong. Now Leo will need the help of Piper and Jason or the entire camp might be destroyed.
 * And, as announced on Rock Center, the anthology includes a debut short story from Rick Riordan's son Haley. Since Haley inspired the entire Percy Jackson series, it seemed only right that Rick asked him to contribute his own original spin on Percy's world for this book. Haley ponders the question: "What happened to the demigods who fought with Kronos' army after the battle in Manhattan?" This is the story of one such demigod.