J. C. Greenburg is the author of many books for young people in the library and reference fields. She's a frequent visitor to schools and pays close attention to kid feedback. She's married to Dan Greenburg of the Zack Files and Weird Planet series, and lives in Hastings-on-Hudson, New York.
Jan Gerardi has illustrated many books for children. Her Teenie Greenies series, including The Little Recycler, The Little Composter, Eco People on the Go!, and The Little Gardener, are the first books she has both written and illustrated. She lives in New Jersey with her daughter and three dogs.

The evil Dr. Kron-Tox has kidnapped Uncle Al and whisked him away in his time machine! Luckily, Andrew has a time machine of his own. But like most of Andrew's inventions, the Time-a-Tron doesn't work quite right. It tumbles Andrew, Judy, and Thudd back to the very beginning of the universe! Will they regain control of the Time-a-Tron in time to save Uncle Al . . . and themselves?
J. C. Greenburg is the author of many books for young people in the library and reference field. She's a frequent visitor to schools and pays close attention to kid feedback. She's married to Dan Greenburg of The Zack Files. The author lives in Hastings-on-Hudson, NY.