Jasmine, Erin, Willow, and Lili are first year middle school students in Washington, D.C., chosen for the academic quiz team because of their expertise in art, math, science, and history--and when a precious, historical ruby is stolen from the school during a tournament the "Jewels" set out to use their talents to solve the mystery.

When Koko Dodo's secret chocolate sauce is stolen just before an important cooking contest Didi, a dodo bird, devises a daring plan to help--whether he wants her to or not.

"Lark and Connor are judges for the annual baking contest at the community center. When they arrive, they discover that someone has destoyed a contestant's entry. And not just any contestant's--Sophie's! Sophie is Lark's best friend (she just doesn't know it yet). The twin sleuths can't simply roll with it. To save the contest, they'll have to take a risk and start investigating the other contestants. With the timer ticking, Lark and Connor have to...