Fourteen-year-old Amy's excitement over her first babysitting job ends when she and her three-year-old charge are kidnapped, but a daily videorecording sent to little Kendra's parents allows Amy to send clues, in hopes of being rescued before the kidnappers decide they no longer need her.

"The Aldens visit Ireland and stay in a beautiful castle that's now a hotel. But at night they see a mysterious figure who walks with a lantern, and think it could be one of the legendary banshees"--

The Alden children travel on a Mississippi paddle-wheel steamer to visit an old family friend in his cabin near Hannibal, Missouri, and try to discover who is responsible for the mysterious activities near the house.

When the Aldens visit a university campus, they must solve a mystery involving an old library whose stone gargoyles seem to move on their own.

While canoeing and backpacking near Timberwolf Lake, the Aldens receive strange warnings to stay away from the area and stumble upon clues to a missing cache of stolen coins.

The Aldens are excited to meet their favorite celebrity--Walter the Cat, who makes the funniest videos on the Internet! And when this celebrity cat inherits a million dollars from his owner, he becomes even more famous! But someone seems to be angry about the will and is stealing things from Walter's house. Is this cat too famous for his own good?

When someone tries to sabotage the maple trees on her friend Franklin's family farm, Truly Lovejoy rallies the Pumpkin Falls Private Eyes to investigate.

"A talented young soccer player in Greenfield is given the honor of being a child mascot at an international soccer tournament in Brazil, but when an anonymous letter insists that she doesn't deserve to go, the Aldens investigate"--

"Marzana and her best friend, Nialla, are bored. In a city where normal rules don't apply, it seems that adventure should be everywhere, yet nothing exciting ever happens to them. Nothing, that is, until Marzana's parents are recruited to help solve a kidnapping that makes no sense. This could be the excitement Marzana and Nialla have been looking for-if they can crack the case without getting caught meddling. They gather a group of kid detectives...

Nancy's friend Maggie gets a star role in the dance Sleeping Beauty. Someone is intent on ending Maggie's career. Will Nancy be able to solve the case?