RICK RIORDAN is the author of all the books in the New York Times #1 best-selling Percy Jackson & the Olympians series: The Lightning Thief, The Sea of Monsters, The Titan's Curse, The Battle of the Labyrinth, and The Last Olympian. 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, The Son of Neptune, The Mark of Athena, and The House of Hades). 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 Barbarian (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.