Eight-year-old Lucas, Prince of Wrenly, is eager to explore and Clara, daughter of the queen's seamstress, knows the kingdom well, so they team up to find a lost jewel and visit all of the land's main attractions as they search.

A bear almost gives up his search for his missing hat until he remembers something important.

After a class trip to a floating zoo where animals are mistreated and Savannah's missing pet monkey is found in a cage, Long Island sixth-grader Griffin Bing and his band of misfits plan a rescue.

Penny feels guilty after taking a beautiful blue marble that she sees in Mrs. Goodwin's grass, but gets a pleasant surprise when she goes to return it the next day.

"Best friends Harry and Doug must find their teacher's missing diamond in time for the class talent show."--

While traveling with her family to Holland to visit her grandparents, Trixie once again loses her beloved Knuffle Bunny.

When Splat the Cat notices that the toy ducks his father makes disappear and then return without their beaks, he investigates the mystery as Secret Agent Splat.

Harry and Doug investigate when special bookmarks begin to disappear while their class is busy studying poetry and running their own post office.

When Zookeeper Fred's green snake Vern gets loose in the zoo, the Questioneers need all their talents to help find him, but in the end, it is Aaron's art that leads the way. Includes facts about snakes.

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.