This picture book will likely horrify any children that happen to read it, assuming they figure out that soylent green is people. Because of that fact, this book has never been particularly successful. The picture book format targets very young readers, but the subject matter and dark humor, with lots of intelligent references (Casablanca is one), make this a treasure for adults, who will, likely, never discover it. Most libraries, I believe, do not carry it, and, if they do, probably not in the picture book section.
BAAA is an underrated gem of a book, coming at twice the length of the standard picture book. This is one to buy and enjoy for yourself, not to share with the kiddies.