RICK RIORDAN is the author of all the books in the "New York Times "#1 best-selling Percy Jackson and the Olympians series: "The Lightning Thief," "The Sea of Monsters," "The Titan's Curse," "The Battle of the Labyrinth," and "The Last Olympia"n. His other novels for children include the "New York Times "#1 best-selling series The Kane Chronicles ("The Red Pyramid," "The Throne of Fire," and "The Serpent's Shadow") and The Heroes of Olympus ("The Lost Hero," and "The Son of Neptune"). He lives in San Antonio, Texas with his wife and two sons. Learn more at RickRiordan.com. Robert Venditti is the "New York Times "best-selling author of "The Homeland Directive "and "The Surrogates," as well as "The Surrogates: Flesh and Bone." He also adapted the "New York Times "best-selling "The Lightning Thief, The Graphic Novel; The Sea of Monsters, The Graphic Novel; "and "Blue Bloods: The Graphic Novel." In 2012, he launched the critically acclaimed ongoing comic book series "X-O Manowar." He lives in Atlanta, Georgia. Visit his Web site at RobertVenditti.com. Attila Futaki is the "New York Times "best-selling illustrator of "The Lightning Thief, The Graphic Novel" and "The Sea of Monsters, The Graphic Novel." He also illustrated and colored "Conan the Barbaria"n (written by Victor Gischler) and "Severed "(written by Scott Snyder and Scott Tuft). Attila studied at the International School of Comics in Florence, Italy. He lives in Budapest, Hungary. Visit AttilaFutaki.blogspot.com. Greg Guilhaumond studied drawing and animation at the European School of Visual Arts. After graduating, he worked in web and graphic design while also doing illustrations for various role-playing games and magazines and producing underground comics. Greg provided the colors for "Severed." "The Titan's Curse," "The Graphic Novel" is his first book for children. He lives in Tours, France. Visit Doublegarga.canalblog.com.