Garden City, NY: Doubleday, 1972.
Anvil never really hit the big time, but he was a popular author in the 1970s and ’80s, when he was a regular contributor to ANALOG. His signature style was wry and ironic observations and commentary about those irritating humans, and this novel (his third) is filled with that sort of thing. It’s an original on the “invasion of Earth” theme, in that the Centrans (who somewhat resemble humanoid lions) conquer our planet — but just barely.