Book List in Order:15 titles


  • Someone is stealing newspapers from Olga's newsstand. Klooz has only one clue to help him -- a terrible stink the criminal has left behind. The case leads him down to the sewers beneath the city. It will take all of Klooz's detective skills -- and a ...



  • The goalie on the Horton Street Hornets is great during practice, but he's terrible during real games. Klooz has been hired to figure out what's making the goalie freeze up. Klooz hates sports, but this case is putting him on the field. Will he solve...



  • Has there ever been a case Klooz couldn’t solve? Of course not. But when the carnival comes to town, Klooz faces a mystery that might ruin his perfect record. How can he save the merry-go-round and defend his name as the best detective in town?...


  • The second Klooz goes on vacation, strange things start happening. Someone is trying to scare the kid detective! It seems that Klooz can’t get a break from crime busting, even when he’s trying to relax!...


  • Olga’s friend Bill the Mask has a problem. His dog has been accused of a crime! Bill says his dog has been set up, but why? It’ll take all of Klooz’s detective skills to sniff out the real suspect....


  • Olga has a case for her favorite fifth-grade detective, Klooz. Someone scratched her new luxury car. Soon Klooz hears that lots of cars in town are getting scratched and scraped. The trail of clues leads him to the car wash on Main Street, where Kloo...






  • Klooz is the best fifth-grade detective in town, right? Wrong! A kid named King shows up and starts stealing, and solving, all the local mystery cases. So the two boys challenge each other to a duel. Whoever solves the next case is the winner. The lo...


  • Klooz has learned a lot since his very first mystery case. It all starts with a missing dad, a kid named Snake, a spooky abandoned building, and a handful of magic, mysterious balls. Do the balls really bring good luck to their owners? Klooz has to f...


  • The Zampano Circus is in town! Primus, the star of the big top, asks Klooz for help. Primus's sister Vanessa is the best juggler in the circus, but she keeps making the same mistake during each show: one of her juggling pins flies into the audience! ...



  • Klooz is the best fifth-grade detective in town, right? Wrong! A kid named King shows up and starts stealing, and solving, all the local mystery cases. So the two boys challenge each other to a duel. Whoever solves the next case is the winner. The lo...