Book excerpt: Trapped in the Precambrian Era 570 million years ago by an earthquake, the X-Venture Xplorers find themselves in a fix- by needing a bigger fix for their time machine! Rain, Sean and Stone are now faced with the challenge of finding electricity in an era where human haven"t even evolved! And to make matters worse, the locals don"t take kindly to them either! Witness all the wonders of our world"s past with these PREHISTORIC PIONEERS!