Toby is a curious tomcat who loves to read. Intrigued by a big book he finds on a high shelf, he suddenly finds himself on a remarkable adventure far back in time- prehistoric time! But Toby is not alone. His friend, Tiger, follows him, and so will every adventurous young reader who opens this book. Each two-page spread, from the Pterodactyl Airport to the Primeval Museum, presents a challenging puzzle, solved by using a variety of searching, matching, and counting skills.