Galaxy Zack blasts back to the past in this outer space chapter book adventure! A baby pterosaur can t find his way home, so it s up to the Nebulon Navigators to return him to the Prehistoric Planet. And when Zack s dad is invited on the journey, Zack finds a way to go along too! But as they blast off on the super shuttle, they hear a strange noise. Is it the pterosaur, crying for his mama? No, it s...Zack s dog, Luna, who has snuck onto the shuttle! When the shuttle lands, Zack can't believe his eyes: The Prehistoric Planet is full of creatures that he s only read about in books. Zack and the team of navigators head out in search of the pterosaur s mother and end up in the middle of an amazing adventure. With easy-to-read language and illustrations on almost every page, the Galaxy Zack chapter books are perfect for beginning readers.