The second installment in the mega-bestselling The 39 Clues series, now in graphic novel form!

Amy and Dan made the choice of a lifetime when they gave up a million dollars in favor of a Clue and joined a competition unlike any the world has ever seen. After barely escaping Paris with their lives, now they're in Vienna to discover the truth about their famous ancestor, Wolfgang Amadeus Mozart, and the long-buried secrets connected to his equally talented but overlooked sister, Nannerl.

But with their enemies closing in, Amy and Dan must decide how much they're willing to risk to find the clues, and who they're willing to betray in the process...

Gordon Korman is the beloved author of over one hundred novels for young readers, including hilarious middle-grade classics such as the Macdonald Hall series, I Want to Go Home, and Slacker. Born in Montreal, Quebec, Gordon grew up in Thornhill, Ontario, and now lives in New York with his family. Visit him online at www.gordonkorman.com.

Hannah Templer is an American cartoonist, best known for her award-nominated original graphic novel series Cosmoknights. She has also worked as a colorist, cover artist and interior artist on titles such as GLOW, Doctor Who, TMNT, Samurai Jack, Jem and the Holograms, Captain Marvel, and Tomb Raider.

Hannah enjoys life with her trusty dog Thistle and back-flipping cat Super Mario, and plays tabletop roleplaying games as often as she can. You can find her online at www.hannahtempler.com.