Gilbert Morris 
Strange Creatures of Dr. Korbo [EPUB ebook] 

The Seven Sleepers have seen their share of strange animals in Nuworld. But Josh and his friends have never seen anything like the animals in Dr. Korbo’s country. Where did squirrels the size of elephants come from, anyway? Is the evil doctor somehow responsible? God knows how to put his people in the right place at the right time. So when the Sleepers hear what Dr. Korbo plans to do next, they decide to stop him. Follow Josh and company into danger and see what happens.