When a set of priceless paintings by Leonardo da Vinci and Rembrandt go missing in Russia, the Kidd siblings head to St. Petersburg and the wild Arctic tundra to find the bad guys and locate the treasure.

Rafe isn't exactly considered a winner in Hills Village Middle School, to say the least, but everything's about to change. He's won a school-wide art competition, and the fabulous prize is getting to jet-set off to Australia for a whirlwind adventure! But Rafe soon finds that living in the Land Down Under is harder than he could've ever imagined. His host-siblings are anything but welcoming, the burning temperatures are torturous, and poisonous critters...

Taking on her biggest challenge yet--preventing climate change from destroying the earth--Max Einstein is pitted against a new evil group that would rather let the whole world crumble than allow her to save the planet.

Max, a teenage superhero with wings, leads her motley crew in a battle against the scientists that created them. In the process, they discover secrets from their past that are darker than they imagined.