Chronicles the first Vesper attack on Jan van Eyck's altarpiece at Ghent in the 1600s, then jumps to WWII and young Grace Cahill's desperate bid to save the masterwork from the Nazis.

Amy and Dan cross the oceans on the trail of a famous aviator, but they find more than they're looking for. Their enemies are becoming more vicious, and the truths they discover more crushing than ever.

After twelve-year-old Addison Cooke's uncle unearths ancient Incan secrets in Peru, he is kidnapped by a shadowy organization intent on stealing the treasure unless Addison and his friends can decipher the clues first.

"The heat is on as someone seems to be melting the polar ice cap. Special Agent EJ12 needs to crack the codes and keep her cool to put the evildoer's plans back on ice. That's the easy part. As EJ12, Emma Jacks can do anything. So why can't she handle the school Ice Queen of Mean, Nema? Perhaps she can after all..."--Back cover.

Geronimo Stilton and his sister Thea search for a secret map hidden beneath a famous painting and soon uncover some amazing clues.

"Evil Agency SHADOW is really rocking the SHINE network. SHINE knows they are planning something, but how are they sending their messages? Special Agent EJ12 must not miss a beat. This time she needs to find the code as well as pull the curtain down on SHADOW. That's the easy part. As EJ12, Emma Jacks can do anything. So why can't she perform with her friends at the school concert? Perhaps she can after all..."--Back cover.

Fifteen-year-old Amber Rawson, who has a passion for archaeology and a talent for deciphering ancient codes, must find the ancient Tebah Stick, a biblical artifact capable of global destruction, and save her kidnapped archaeology instructor.

In 1666, after four months away, friends Christopher Rowe, Tom, and Sally return to London triumphantly but, guided by coded riddles, face a conspiracy that threatens Christopher, as well as the King himself.

A Clue found in Book 3 sends Amy and Dan jetting off to find out just what's behind the fierce rivalry between the Tomas and Ekaterina branches of the Cahill family. Was a Clue stolen from the Tomas branch? Where is it now? And most important, can Amy and Dan get their hands on it before their rivals do?

657 days ago Meg's British father left their home in France to fight the Nazi's, leaving some codes in a jar for her to decipher, and Meg and her French mother moved to the Perche, a region in France near Normandy known for its forests; now Meg watches the German soldiers in town, and sometimes carries messages for the French resistance--but suddenly things have gotten much more dangerous: there is a wounded British officer hiding in her grandmother's...