Alvin Ho has noticed something strange going on at home. His mother is getting bigger and bigger! At first, he is sure it is just too many mochi cakes, but the truth is even more terrifying: there is a baby on the way. For a boy who is already afraid of everything from burglars to Bumps in the Night, a new sibling is a major catastrophe. Alvin has to prepare for the worst. He tries to learn CPR and worries about the horror of changing diapers. But his biggest fear? The baby might be a girl! The stress is so high that Alvin starts to think he might be pregnant too. Through a series of hilarious misunderstandings, Alvin navigates the bumpy road to becoming a big brother while managing his usual list of anxieties. This fifth installment of the beloved series is a laugh out loud look at growing families. It captures the frantic energy of a second grader trying to make sense of a changing world, offering a warm and funny perspective on sibling relationships and overcoming fear.