Max the dog and his human friend Tori have boarded a time machine on the way to their greatest adventure yet -- back to the Ice Age! There, they encounter prehistoric mammals and are even chased by a saber-toothed tiger. Logan Weinman's simple story and artwork are accompanied throughout the book by question-and-answer balloons written by series creator Jeffrey Bennett. The balloons answer common questions about time travel, ice ages, global warming, prehistoric animals, and more. The engaging story appeals to even very young children, while older children and parents appreciate the book's stimulating science content.