Mary Pope Osborne

The #1 bestselling Magic Tree House series is ready to whisk you away across the world with Jack and Annie—this time as World Turtle Experts in the Galapagos Islands!!
It's just a regular day when ordinary kids Jack and Annie are whisked away in the magic tree house to the Galapagos islands, where they must save a giant tortoise from an erupting volcano! But what do Jack and Annie know about saving turtles?! Plenty, thanks to some magic...