The town's ten-year-old walking encyclopedia again solves ten neighborhood mysteries. The final solutions to the cases are at the back of the book, giving the reader a chance to compare his skill to that of Encyclopedia Brown.

What do you do with a problem? Especially one that follows you around and doesn't seem to be going away? Do you worry about it? Ignore it? Do you run and hide from it? This is the story of a persistent problem and the child who isn't so sure what to make of it. The longer the problem is avoided, the bigger it seems to get. But when the child finally musters up the courage to face it, the problem turns out to be something quite different than it appeared....

When pets go missing in Blue River Creek it is up to Ada to follow the scientific method by making a hypothesis, collecting data, and experimenting to find the missing animals.

One, Two, Kat, and Four want to form a club so together they figure out how to make a sign saying what their club should be called.

When Destiny Washington gets the notion that everyone's favorite teacher, Ms. Katz, is going to be dismissed from the Zigzag Afternoon Center, she and classmate Yolanda think of several ways to save her.

As the children plan a birthday party for Mrs. Piggle-Wiggle, the loveable problem solver, with her trunk full of magic and her animal friends in tow, offers cures for such common conditions as watching too much television and the fear of trying new things.

Peg and Cat build an amazing car out of things they find in the junkyard. They name her Hot-Buttered Lightning and plan to win the Tallapegga Twenty--if they can make it out of the junkyard. It's a good thing Peg knows a thing or two about the best shape to use to make wheels. Will Peg and Cat be the first to complete 20 laps and win the golden cup?

Max Einstein and a group of international geniuses use their creativity and curiosity to help solve some of the world's toughest problems with science.--

"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!" -- Provided by publisher.

Lola is excited when abuelita and Lola's cousin Luis come to visit from Guatemala. The fun doubles when Lola and Luis discover that they both have a wiggly tooth! Lola is looking forward to a treat from the Tooth Fairy, but Luis is worried. How will el Ratón--the Guatemalan mouse who brings money for lost teeth--find him in Texas? Lola and Luis brainstorm solutions to this problem, but el Ratón may have a surprise in store for them both! Lola...