Back to the Ice AgeBook - 2008
David is stuck with the world's worst babysitter. But when she accidentally zaps herself back in time, his problems are far from over. If she's still missing when his parents get back, they'll freak out! David and his best friend, Ben, must blast into the past to save the stranded sister.
Publisher: Mankato, Minn. : Stone Arch Books, c2008
Characteristics: 33 p. :,col. ill. --