Eight-year-old Just Grace and her best friend Mimi embark on a campaign to convince Grace's parents that they are responsible and dependable enough to get a dog.

Count on third-grader Grace to cook up a creative compromise just in time to save the day at the cupcake-themed school fair.

As Grace and her classmates study foods from other cultures, she has the opportunity to ponder such mysteries as whether Owen 1 is really bad or not, why she feels jealous when her father helps her best friend with her hot dog report, and how Augustine Dupre, her family's French boarder, can be so wise.

Lucía y Mimi están nerviosas porque la nueva hermanita de Mimi está a punto de llegar ¿Cuántos años tendrá? ¿Y cómo se llamará? ¡La bienvenida a un nuevo miembro de la familia es una ocasión muy especial! De repente, las vidas de Lucí y de Mimi estarán llenas de preguntas y de sorpresas. While Grace and her best friend Mimi are waiting for the arrival of the baby sister Mimi's family plans to adopt, Grace gets a big surprise.

Grace ponders such mysteries as whether Owen 1 is really bad or not, why she feels jealous when her father helps her best friend with her hot dog report, and how Augustine Dupre, her family's French boarder, can be so wise.