233 pages
English language
Published May 28, 2006 by G. P. Putnam's Sons.
233 pages
English language
Published May 28, 2006 by G. P. Putnam's Sons.
Ben, Zara, Sam, and Marcia begin their summer vacation by helping Professor Ampersand and a new friend build the Silver Turtle, a futuristic airplane, but on the day the first test flight is planned, a strange woman steals the airplane with the children inside.