Rick Riordan is the #1 New York Times bestselling author of the Percy Jackson and the Olympians series, the Kane Chronicles, and the Heroes of Olympus. He is also the author of the multi-award-winning Tres Navarre mystery series for adults.

For fifteen years, Rick taught English and history at public and private middle schools in the San Francisco Bay Area and in Texas. In 2002, Saint Mary's Hall honored him with the school's first Master Teacher Award.

While teaching full time, Riordan began writing mystery novels for grownups. His Tres Navarre series went on to win the top three national awards in the mystery genre - the Edgar, the Anthony and the Shamus. Riordan turned to children's fiction when he started The Lightning Thief as a bedtime story for his oldest son.

Today over 35 million copies of his Percy Jackson, Kane Chronicles, and Heroes of Olympus books are in print in the United States, and rights have been sold into more than 35 countries. Rick is also the author of The 39 Clues: The Maze of Bones, another #1 New York Times bestseller.

Rick Riordan now writes full-time. He lives in Boston with his wife and two sons.

Robert Venditti is a New York Times bestselling author of more than three hundred comic books and graphic novels. Some of his works include the monthly comic book series Justice League, Superman ’78, Hawkman, and Green Lantern for DC Comics, X-O Manowar, Armor Hunters, and Wrath of the Eternal Warrior for Valiant Entertainment, and the graphic novel Six Days, inspired by the story of his uncle’s participation in D-Day. He has also adapted Rick Riordan’s global bestselling Percy Jackson and the Olympians and The Heroes of Olympus novels, as well as Tristan Strong Punches a Hole in the Sky by Kwame Mbalia and Blue Bloods by Melissa de la Cruz. His graphic novel The Surrogates was adapted into a feature film by Touchstone Pictures, and his work on The Flash was the basis for season three of the CW television series.

Venditti lives in Atlanta, where he both writes and serves as a storytelling consultant for some of the most recognizable entertainment brands in the world.

Harvey Award winning artist José Villarrubia is a professor in the Illustration Department of the Maryland Institute College of Art. He has also been nominated for the Eisner Award twice and regularly works for all the major American comic publishers (Marvel Comics, DC Comics, Dark Horse Publishing) as a colorist. His fine art photography has been shown internationally in over 100 exhibitions and is the collections of the Baltimore Museum of Art and the Inter-American Development Bank. As an illustrator, he is best known for his collaborations with Alan Moore: Promethea, Voice of the Fire and The Mirror of Love. Recent published work include illustrating Hungry Ghosts by Anthony Bourdain, and two GLAAD Award nominated series: Marvel’s America and DC’s Deadman: Dark Mansion of Forbidden Love.