I've read this book 2 or 3 times, and listened to the Audio book at least twice. It's a great book about helping island ecosystems recover. Mostly from Rats, but there is a fair bit of information on feral cats as well (which are almost as destructive as Rats). It gives a good overview of how to get introduced species off an island, once they are established. Methodology has to adapt to species (Rats are adaptable), weather, cost, acceptable losses among non target species (You'll never achieve perfection) and any other factor that comes up. Great book!