Join Lottie as she eagerly awaits the arrival of her new sister, imagining all the fun they'll have together. From swimming lessons to climbing trees, Lottie has grand plans. However, when her baby sister finally arrives, she seems more interested in naps than adventures and Lottie's patience wears thin. Will she ever get to play with her little sister? Through its charming rhymes and adorable illustrations, I'm Going to Have a Sister sensitively explores the emotions of an older sibling adjusting to the presence of a new baby in the family.