Mastodonia

Asa Steele was a paleontology instructor from a small western college- and just about fed-up with it. He returned home to rural Wisconsin on sabbatical to think things over- and to investigate what he thought might be the site of a crashed UFO that he remembered as a boy. Like so much else, it was still there unchanged. The fragments that he excavated came back from the university lab as belonging to an unknown alloy with extraordinary properties. Yet there was nothing else that really proved an extraterrestrial origin. That is, until his dog started to bring back dinosaur bones and other artifacts from the gateway that the ship had punched through the space-time fabric. The adult character development is quite good. So are the plot complications (of course the government would try to seize a gateway into the past- to hand over to its corporate masters.) But the theme of unlimited, pristine, uninhabited worlds ready for the taking are what really sets this particular book apart.-Oakshaman at Amazon.com.