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.
Cody Smith and his friends are immersed in mysteries for each of the holidays.
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.
The Koots met on Gabe's front porch. They found out that Mrs. Gomez lost a very old vase, Mrs. Wu is missing a picture and Mrs. Prudy is missing a very old doll. "Wow, three things missing. I think we have a case," Ty said.
The Kooties Club solves a mystery involving the theft of a ring.
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.
The Koots try to discover who is behind the canned laughter that appears every time something goes wrong for one of the boys.
When strange things begin appearing on the school computers, the Koots set out to find the hackers.
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.
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.
The Koots decide to spy on Mr. Dodge to find the answers to unexplained questions about his blindness, state of health, and family situation.
The boys investigate a new neighbor whom they think has a secret about the past and in doing so learn about Ben Franklin.
The members of the Kooties Club try to figure out who is leaving the "I Love Elvis" signs throughout the neighborhood.
Ty and Gabe hear yelling and screaming and someone very bad laughing in apartment A-13.
