Principal Wagner confidently deals with a faculty washroom crisis, a psychic parrot, and a terrorizing gerbil, but when sixty-five erasers go missing, he enlists the help of the school's best problem solver and locator of lost items, twelve-year-old Lyle Williams, aka Mudshark.

Seventh-grader Emma-Jean Lazarus uses her logical, scientific mind to navigate the mysteries of the upcoming Spring Fling, her friend Colleen's secret admirer, and other love-related dilemmas.

Lord Dougal asks the detective Tweedy and his assistant Rollo to solve the mystery of the ghost haunting Dougal Castle.

In ancient India, a boy named Bhagat travels to the rajah's city, hoping to ensure his family's prosperity by winning a place at court as a singer. Includes author's note about binary numbers.

"Molly gets things stuck in her head sometimes. When she sees a jar of candy on Principal Shelton's desk, she absolutely needs to know how many candies are in that jar! Luckily, her two best friends, Simon and Rosie, are ready to help her find the answer--even if it means detention for all of them!"--

Lola and her cousin Luis, who is visiting from Guatemala, each have a loose tooth and come up with ideas to help el Rataon, the Guatemalan tooth fairy, find Luis and his tooth in Texas.