Fans of Dav Pilkey's The Adventures of Ook and Glook and Patricia Reilly Giff's ZigZag Kids will flock to this chapter-book mystery series full of slapstick humor and silly situations by the wildly popular Tony Abbott, author of the Secrets of Droon series. Jeff, Mara, Brian, and Kelly are Goofballs and proud of it. Goofball private eyes. Together, they solve mysteries. How do they discover the truth? They use funny disguises, nutty inventions, and their secret weapon: Sparky the Goofdog! Objects have been disappearing from Ms. Becker's kindergarten classroom - blocks, an easel, even the class goldfish! Luckily, the Goofballs are ready to go undercover to help their former teacher learn the truth. But posing as teachers is hard work, especially when the entire class may be as smart as Kelly, as observant as Jeff, as creative as Mara, and as goofy as Brian. Everyone's a suspect, and every time the Goofballs turn their backs, something else vanishes. Soon, the whole classroom will be gone! Have the Goofballs been out-goofed? These young sleuths have never failed so solve a case, and they don't intend to start now!

When objects go missing in a kindergarten classroom, the Goofballs go undercover as teachers to crack the case!

For use in schools and libraries only. When objects go missing from their favorite teacher's classroom, the Goofballs volunteer to go undercover as teachers themselves to solve the case.

A hidden door. A magical staircase. Discover the world of Droon! There's no place like home! Eric and his friends have finally restored the Rainbow Stairs, but that was the easy part. Now Gethwing is loose in the Upper World, and the Moon Dragon is causing big trouble. Eric, Julie, and Neal have to protect their town, but they're up against mysterious creatures, strangely-behaving parents, and powerful magic. Can the kids stop Gethwing before he destroys the Upper World -- for good?

Long-time friends and fellow sleuths Jeff Bunter, Brian Rooney, Mara Lubin, and Kelly Smitts, collectively known as the Goofballs, investigate the disappearance of Thunder the pony in their town of Badger Point.

Rich kid Ryan Crandall asks the Goofballs to protect his famous collection during his superhero masquerade party, as Jeff, Mara, Brian, and Kelly get into costume and rise to the challenge

A NEW YORK TIMES and WALL STREET JOURNAL bestseller 'A must read for entrepreneurs of all stripes' - Eric Ries, author of The Lean Startup From three partners at Google Ventures, a unique five-day process for solving tough business problems, proven at more than 100 companies. What’s the most important place to focus your effort? How many meetings and discussions does it take before you can be sure you have the right solution? What will your idea look like in real life? How do you start? Now there’s a surefire way to answer these important questions: the sprint. Designer Jake Knapp created the five-day process at Google, where sprints were used on everything from Google Search to Google X. He joined Braden Kowitz and John Zeratsky at Google Ventures, and together they have completed more than one hundred sprints with companies in mobile, e-commerce, healthcare, finance, and more. A practical guide to answering critical business questions, Sprint is a book for teams of any size, from small startups to Fortune 100s, from teachers to nonprofits. It’s for anyone with a big opportunity, problem, or idea who needs to get answers today.