The Kidds head to Russia where a set of priceless paintings by Leonardo da Vinci and Rembrandt has gone missing. Hot on the trail of the daring thieves, the Kidds race through the sinister streets of St. Petersburg and the wild Arctic tundra to track down the stolen treasure.

Alex and his grandfather hold the fate of history itself in their hands in a Rick Riordan meets Raiders of the Lost Ark adventure of epic proportions! "A few months ago, Alex's world changed...forever. Now, just when it seems life is almost getting back to normal, Alex's grandfather crashes back into the picture with grave news: their friend Harry has fallen into the clutches of a familiar foe, and the old man needs Alex's help to rescue him. This...

"When rare paintings go missing, the InvestiGators are called on the scene...the ART SCENE! Mango and Brash go undercover and under canvas as internationally renowned painters to expose a crook who has truly mastered the art of CRIME! Can they recover the missing masterpieces and save the city art museum's fundraising gala before it's too late...and they run out of appetizers? Find out in this latest piece de resistance of action-packed illustrated...