It’s obviously the sequel to The Boss Baby, which I’ve never read, but would like to get, base on the recommendation of this book.  The illustrations and text work together to tell the tale of the arrival of a new baby sister, from the perspective of the toddler big brother, who is used to being the boss, but is finding himself displaced, that is, until baby sister manages to wrap him around her little finger.  It’s fun, and a fresh twist on the new-baby-in-the-home theme.  For librarians who have parents who might object to such things, you should be aware that the illustrations include mom breast-feeding baby (or providing “organic catering service”), toddler stripping down and peeing in the flowers (backside view), and parents sipping martinis together when peace is restored to the household.