Footfall

Footfall is a 1985 science fiction novel by American writers Larry Niven and Jerry Pournelle. The book depicts the arrival of members of an alien species called the Fithp that have traveled to the Solar System from Alpha Centauri in a large spacecraft driven by a Bussard ramjet. Their intent is conquest of the planet Earth.

== Plot == The alien Fithp resemble baby elephants with multiple prehensile trunks. They possess more advanced technology than humans, but did not develop any of it on their own. In the distant past on their planet, another species was dominant. The predecessor species badly damaged the environment, rendering itself and many other species extinct, but left behind their knowledge inscribed on large stone cubes from which the Fithp gained their technology. An arms race between two rival herds threatened to render the species extinct, so they wagered to see who would depart in a starship and seek a new home elsewhere. The leadership of the loser formed the Chtaptisk Fithp ('Traveling Herd').