Andi is excited when the newspaper for dogs that she and her brother Bruce start becomes a big success, but when a group of dognappers appears on the scene, Andi and Bruce work to uncover the culprits and rescue the dogs.

Orphans Amy and Dan Cahill, continuing their worldwide quest to track down the thirty-nine clues that will reveal the secret of the Cahill family's power, follow a link to one of the planet's strongest fighters, and have a run-in with the unreliable Alistair.

As the new Keepers of the School, sixth-graders Ben and Jill must decipher a handful of clues written as maritime riddles to save their school from demolition by a greedy company.

"With a knack for trivia, Encyclopedia solves mysteries for the neighborhood kids through his detective agency. But his dad is also the chief of police, and every night, Encyclopedia helps him solve his most baffling crimes. Join Encyclopedia Brown as he solves ten confounding mysteries, involving a kidnapped ambassador, two suspicious boxers and missing money, and more. And with the clues given in each case, readers will have a chance to solve the...

Dan Cahill and his sister Amy travel from the hottest to the coldest regions of the world in order to stop someone from using their own power against them.

Charlie and Annie find Tyler and the magician Brack on the thirteenth floor of the Abracadabra Hotel, but Charlie and his friends still have to solve the mystery of who is trying to steal the twelve priceless statues of Enrico Endriago which have been locked in room 1308 for fifty years.

When Catalina "Cat" Duran and her friends in the History Club arrive at Mount Rushmore on a school trip they find that someone is playing dangerous tricks and trying to drive people away from the park.

Samantha "Sam" Archer, her friends, and their "kindergarten buddies" are on a trip to the River City Children's Museum, which has been plagued by vandalism, and it is up to the sixth-graders and their new buddies to figure out who the vandals are and why they are set on closing the museum.

When twelve-year-old aspiring detective Myrtle Hardcastle learns her neighbor in quiet Swinburne, England, a breeder of rare flowers, has died she is certain it was murder and that she must find the killer.

Teddy Fitzroy must solve the crime of the kidnapped rare and expensive panda, Li Ping.