The Crystal Lair

A parallel universe, a crystal cave, a talking mastodon, and one tough granny.The World Jumper has misfired and inventor-in-training Angus Clark finds himself in a primitive, snowy village with no running water, no electricity, and enormous animals that haven’t roamed the earth for thousands of years. Together with the fearless Ivy Calloway, Angus must battle a prehistoric monster, rescue his little...