Zack Files 17: Yikes! Grandma's a Teenager (The Zack Files) (Book:17)

A trip to New York City to celebrate her 89th birthday--and participate in a Rockettes reunion at Radio City Music Hall--leaves Zack's Grandma Leah feeling younger than springtime. And she's looking that way too, since a strange trip through an airport metal detector turned back the hands of time and is making Grandma grow younger and younger!