Eight-year-old Ruby Booker is the baby sis of Marcellus (11), Roosevelt (10), and Tyner (9), the most popular boys on Chill Brook Ave. When Ruby isn't hanging with her friend, Theresa Petticoat, she's finding out what kind of mischief her brothers are getting into. She's sweet and sassy and every bit as tough as her older siblings. She sings like nobody's business; she has a pet iguana named Lady Love; her favorite color is grape-jelly purple; and when she grows up, she's going to be the most famous woman animal doctor on the planet. She's the fabulous, oh-so-spectacular Ruby Marigold Booker! In Book 1, Ruby is leaving her old school and headed to a new one where nobody knows her--and where her older brothers rule. But that's about to change, because Ruby Booker has BIG plans! Although things don't go according to plan, Ruby manages to grab the spotlight when she sings a song over the P.A. system during announcements. By the time school lets out, one thing is clear: Ruby Booker isn't "the Booker Boys' baby sis" anymore.