This book could well be called Avis Acres Hates Possums, and considering the dreadful things they do to endemic wildlife here in New Zealand, so she should. Still, in this book the possum gets his, and given that he makes up songs about eating baby birds, no-one feels sorry for him. It's perhaps the least sentimental of the series, masking ecological concern with fairy tricks, and of the three it's the one I like the best.