Bella's New Baby (Little Golden Book) by Sue Fliess
A Little Golden Book about a happy family milestone: a new baby!
When Bella hears she’s going to be a big sister, she pictures all the fun she’ll have with a sweet baby girl. But the new baby turns out to be a boy! Bella is disappointed at first—until she holds him for the first time and imagines how wonderful life will be with a baby brother.