Ruby and the Royal Baby by Julie Sykes
A princess, a palace and six cute kittens! There's great excitement in the palace. The Queen is having a baby. Princess Katie and her best friend Becky can't wait and busy themselves helping to prepare for the new arrival. Tilly, the silver and white kitten wants to help too, but her efforts lead to trouble. Then Tilly disappears. Princess Katie and Becky set out to find her and discover something surprising!