"Like the heroes of Dav Pilkey’s “Dog Man” or “Captain Underpants,” the InvestiGators are bound to resonate with kids." —School Library Journal

More than three million copies in print!

InvestiGators fans, get ready to dive into the third volume of Agents of S.U.I.T. with the weirdest mystery yet!

New S.U.I.T. recruit Zeb the sheep joins the flock to help crack the greatest mystery of all! But, uhh...just what is the greatest mystery of all?

That's the question that's kept the dearly departed General Inspectre haunting Earth long after he should have moved on to the great super-spy base in the sky. Having a ghost in the halls of S.U.I.T. wouldn't be so bad...except he's possessing agents! Zeb -- along with Cilantro, Bongo, Marsha, and everyone's favorite Gators -- must decipher the series' biggest mystery EVER. They've got to free their pal and finish the Inspectre's unfinished business!