The prologue to the third Max Einstein book tells us that twelve-year-old genius do-gooder Max traveled as a baby from 1921 to the early 21st century when an experiment in her genius parents’ basement went a little ca-ca. Later on, Einstein himself makes a cameo appearance, possibly by opening some kind of communication line from the past to Max in her moment of need, but nothing else crops up in the way of time travel. I suspect that a truly genius rebel child would toss this aside as being condescending, preachy, one-dimensional, and melodramatic (not in a good way), as well as innacurate in most of its science and guilty of oversimplifying complex world problems.