Year of the Angry Rabbit by Russell Braddon

I'll start by pointing out that we don't actually have this in our collection, although it is obtainable through interlibrary loan (which is how I got it). Nor do we have the movie based on it, Night of the Lepus. We wouldn't get it even in the unlikely event that it's available for purchase, based on its Rotten Tomatoes rating of a whopping 11%. Read the critical reviews, they're right on target. (In my defense, I'm pretty sure I caught the movie on an episode of Mystery Science Theater 3000. Also, it was in a Jeopardy answer. I got the question right.) The movie is about giant, carnivorous rabbits in the American Southwest. The book, set in Australia, is about the dangers of political corruption and an uninvolved electorate. The rabbits serve mostly as a domino. A rancher has a rabbit problem, so he extorts help from the politician he got elected. Then things go horribly wrong. Then they go fantastically right for Australia, which extorts the rest of the world into doing what Oz wants under threat of bio attack. Then things go horribly wrong again. And from there, they can only get wronger. For the most part, though, the rabbits aren't particularly important. It's a scary creature movie. It's a political satire book.
Here's the movie poster: