J. C. Greenburg

When Beeper accidentally releases the escape hatch to the Time-a-Tron, the time travelers must protect themselves from the world's most fearsome creature, Tyrannosaurus rex.

When Andrew and Judy, still the size of beetles, are carried into a cave, they learn more than they ever wanted to know about the bats and bugs that live there from Thudd the Robot--and personal experience.

Still trying to stop the evil Dr. Kron-Tox, Andrew, his cousin Judy, Thudd the robot, and Beeper find Uncle Al in the Ice Age, where they encounter prehistoric animals, birds, and people.

While in the Australian desert, ant-sized Andrew, his cousin Judy, and Thudd the robot are carried away by a dust-devil and face many dangerous creatures, from a flock of wild parakeets to a Perenti lizard, as they try to make their way back to Uncle Al.

Andrew, his cousin Judy, and Thudd the robot wind up at a garbage dump when Andrew's latest invention, the Goa Constrictor, shrinks them to the size of beetles and swallows them.

After escaping from the belly of a whale, Andrew and his cousin Judy face more dangers from their underwater nemesis, Soggy Bob, in the Great Barrier Reef.

When an electric fish shrinks Andrew, Judy, and Thudd to the size of bacteria, they end up being injected by a mosquito into Uncle Al's bloodstream where they must battle germs, parasites, and white blood cells.

On the Dog
When Andrew’s latest invention, the Atom Sucker, goes haywire, Andrew and Judy are shrunk down to microscopic level! Andrew and Judy find themselves lost on their neighbor’s dog, where they encounter everything from colossal fleas to crab-like eyelash mites. Now they have to find their way back to the Atom Sucker and get unshrunk before it’s too late!
In the Bathroom
When Andrew and Judy’s...

Andrew, his cousin Judy, and Thudd the robot, having been shrunk by a shrinking machine, encounter many terrifying creatures, including Mrs. Scuttle, as they try to reach the Atom Sucker before it explodes.