Desperately searching for the other Concentrators that are fatally disrupting Earth's orbit, Eleanor and her companions are labeled as terrorists by G.E.T. forces that would eliminate all but a few select people.

Twelve-year-old Fisher Bas and the clone he created try to prevent a mad scientist and his evil clone brother from trying to take over the world through a behavior-altering television program.

Five brilliant but wacky kids get dragged to a deserted island by their scientist parents and they must try to save the entire island from destruction at the hands of a mad bomber.

Kat is reluctant to visit her Uncle Vic Frankenstein because of all the rumors about him. People in the small town where he lives say he's a mad scientist like his great-grandfather, Victor Frankenstein, who created a monster that came alive and terrorized the town. But Kat is relieved to find that even though he lives in a dark, old castle-like mansion, Uncle Vic is a quiet, gentle man, a scientist interested in building robots with artificial intelligence....

Mad scientist Dr. Alowishus Cobalt has used a tractor beam to alter the course of a comet and aim it at Earth, and it is up to the Kid Squad--Pi, Athena, Gadget, Tank, and their trusty cat D-Day to save the world from destruction.

When the testing of a nuclear-powered invisibility device goes awry, Captain Rudolph Von Dorn is transformed into the evil Captain Cyclops, blowing up ships and islands at will--and the Kid Squad, with the help of Von Dorn's daughter Jenny, is called upon to reverse the effects of the accident and save the world.

In this compilation of two separately published works, J.D. locates two more of his "cousins", the descendents and relations of the people whose body parts Doctor Frankenstein used--and he also encounters vampires, werewolves, the Invisible Man, and the relentless Fran, who wants to recreate her father's experiments.

In this combination of two separately published works, J.D. discovers that he is the son of Frankenstein's monster, and armed with the Doctor's journal he sets out to find his "relatives"--the descendents and relations of the people whose body parts Doctor Frankenstein used.

In New York City J.D. discovers Bertie, who is rich and spends his days sitting on his butt, which is the body part that makes them "cousins"--but Frankenstein's daughter has also arrived, and enlisted the help of the Werewolf and the Invisible Man, so J.D. will have to figure out a way save both Bertie and himself.

On the day the orphanage where he has grown up closes, J.D. discovers that he is the son of Frankenstein's monster, so he sets out to find the people that all the mismatched parts that he inherited came from--and do it before Frankenstein's creepy daughter, who wants to outdo her father, can find them.