Oppel, Kenneth

The bat's earliest ancestors, "chiropters," face great evolutionary changes, lead by the youngest son of the colony leader, Dusk, who is the only one that has the ability to fly and see during the night using his echo vision.

In 1973, when a renowned Canadian behavioral psychologist pursues his latest research project--an experiment to determine whether chimpanzees can acquire advanced language skills--he brings home a baby chimp named Zan and asks his thirteen-year-old son to treat Zan like a little brother.

Muscular sixteen-year-old Paul tries to find his genetically stunted younger brother Sam in the polluted ruins of Watertown, where Sam is trying to cure himself with toxic "dead water" that alters the metabolism of those who drink it.

Griffin, a young bat, is sucked into the "Underworld, " and his father follows to rescue him.

Griffin, a young bat, is sucked into the "Underworld," and his father follows to rescue him.

As members of the first crew of astralnauts, Matt Cruse and Kate De Vries journey into outer space on the "Starclimber" and face a series of catastrophes that threaten the survival of all on board.

Muscular sixteen-year-old Paul tries to find his genetically stunted younger brother Sam in the polluted ruins of Watertown, where Sam is trying to cure himself with toxic "dead water" that alters the metabolism of those who drink it.

Tina creates a robot called Tinatron 1000 that knows how to do everything perfectly before it shorts out and goes missing.

Peg, a big strapping seven-year-old lass who has caught everything else in the sea, joins the crew of the whaling ship Viper and sets out to catch herself a whale.