Alan Dean Foster

Quofum is a science fiction novel written by Alan Dean Foster.

OUR WORLD. THEIR WAR.They once lived on a distant planet, which was destroyed by the ravages of war–a war waged between the legions who worship chaos and those who follow freedom. In search of a powerful energy source that is essential to the survival of their race, they have now come to Earth. They are among us, …

In the not-too-distant future, a spaceship crashlands in Los Angeles, and aliens infiltrate the city's crime fighting force where only one tough detective sees the evil of these "harmless" creatures, one of whom becomes his partner