Get ready for Chase and Ava's newest adventure! When they touch a dinosaur egg inside their magical suitcase, Chase and Ava jump back to prehistoric times! They'll need to work to return the egg to its rightful nesting place before they become dinosaur dinner. But bad guy Randall is still following them... Will they finally get some answers about this mysterious bad guy? Newly independent readers will eat up this time-travel series from New York Times bestselling author, Wendy Mass!