Calling all Earthlings! Soar across the Milky Way with Miles and the Callisto family in their blastastic adventures. The Callistos search for the missing Professor Rubicon, who was last seen researching ancient dinosaur fossils on a frozen planet. Then, an Explorer Exchange scavenger hunt on Mars turns into a rescue mission when Miles’ friend Rygan goes missing. And when Miles and Loretta travel to planet Iridium to meet Skellig Ro, a legendary guru in the alien martial art of Naxos, they find that the journey is the destination. Come explore a great big galaxy with the Callistos!