The Koots are on the trail of a counterfeiter after Ben and Toby are questioned by Officer Gomez about passing a fake twenty-dollar bill.
The Koots investigate the appearance of a flying cloth-bound object that looks exactly like a mummy.
Trying to juggle his job at "Taste of Italy" along with writing papers for school and his graduation requirement to volunteer at the Golden Oaks Retirement Home, class clown Derrick uses humor to get the jobs done.
Cody Smith and his family are new in a small town. When he reads an article about a local woman who collects antique carousel horses and was sold a fake, Cody wants to solve the mystery and find the crook.
Cody finds himself in danger when he receives a note that warns him of bad luck on his big bike ride. He has to find out who's behind the note and why he is the target.
When Cody, his mom, and his friend Maria arrive in the Florida Keys to house-sit for their friend Sally West, they are warned about a kidnapper at large in the neighborhood who tried to abduct young Angela Gomez.
Cody and his friend Maria find themselves in the middle of several mysteries as they search for a missing emerald necklace.
Cody is involved in another mystery. When the cat keeps vanishing and a mysterious stranger is hanging around, Cody needs to do a little investigating to solve the case.
Transported accidentally back in time to a college campus in the South in 1931, Kenneth and Aleesa meet the young Langston Hughes on his poetry-reading tour and confront racism and threats to Hughes first-hand. What do they discover about the real power behind his words?
Eighth-grader Derrick wants to be a stand-up comedian, but his football coach, his parents, Joe, his boss at Taste of Italy, his English teacher Dowling the Dragon, and his Mr. Perfect older brother Craig don't think he's so funny. When Derrick discovers he needs a B on an English paper to stay eligible for football, how can he tame his smart mouth to stay out of trouble?
While spending the summer on his grandparents' Texas cotton farm, Michael sees a teenage boy on the other side of the Rio Grande in Mexico. He starts to write letters to Javier, and then helps him cross the river to come into the United States.
While on detention for disrupting a science lesson, Kenneth and Aleesa are transported to 1939 where they try to protect the privacy and even the life of Albert Einstein as he struggles to decide whether he should help build an atomic bomb to stop Hitler. Can they stop the Nazis from getting the atom bomb first?
After being adopted by Michael's family and moving from Mexico to Dallas, Javier tries to adapt to life in the United States but realizes he misses his old life in Vera Cruz, Mexico.
Cody Smith and his friends are immersed in mysteries for each of the holidays.
David and his family use his grandfather's time travel machine to go back in time to the Chicago where David is teaching four boys to speak English as he experiences the Chicago World's Fair. .
David and his family use his grandfather's time travel machine to travel to 1853 Ohio, where they assist runaway slaves on their journey north on the Underground Railroad.
Brothers Tim and Josh find themselves alone in the wilderness after surviving a plane crash in which the pilot dies and must make their way back to civilization.
Determined to identify the large four-legged creature sighted by Abe on a stormy night, the Koots find their first clue to be a hugh paw print.
When Dog, Mr. Dodge's big cat, starts bringing home gifts resembling animal guts, the Koots set out to find the source of the gooey presents.
When strange things begin appearing on the school computers, the Koots set out to find the hackers.
The Koots try to discover who is behind the canned laughter that appears every time something goes wrong for one of the boys.
The Kooties Club solves a mystery involving the theft of a ring.
The Koots try to find answers to unexplained questions about an old car.
When the Koots decide to dig a hole in an abandoned lot big enough to house "The Kooties Club Cave," they are suprised to find an old rusty knife which leads to further excavations to uncover its still hidden victim.
Ty thought he was aware of all of his food allergies, but after he collapses on the sidewalk due to an allergic reaction, the Koots hope to find the cause of his illness by following food clues.