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 she has big plans. 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 Trivia Queen, 3rd Grade Supreme, a zoologist is coming to visit Ruby's school, and there will be one representative from grade levels 2-8 chosen to compete in an animal trivia contest. The winner will land season passes to the Chill Brook Zoo for everyone in their grade level. Ruby, who can absorb factual information quickly and recall it at any time, is the third grade delegate, and her brothers are on board to help - or hinder - her preparation.