"In 1989 someone is threatening to steal the crown jewels, so the Queen of England summons Mac B. to England to protect them--and when they are stolen from a locked dungeon cell, where Mac and Holcroft, one of the warders, are supposed to be guarding them, it is up to Mac to figure out how they were stolen, and whether the thief is the descendant of an Irish soldier-of-fortune who tried to steal them in 1671, or someone else entirely."--

Griffin Bing is in big trouble when a Super Bowl ring disappears from his middle school's display case, replaced by Griffin's retainer, and the more he and his friends investigate, the worse his situation becomes.

"Chaya, a nobleman's rebellious, outspoken, no-nonsense daughter, just can't resist the shiny temptations the king's palace has to offer. But playing Robin Hood for her impoverished community doesn't come without risks, and when Chaya steals the queen's jewels from a bedside table--a messy getaway jeopardizes the life of a close friend. After an equally haphazard prison break, Chaya barely escapes on the king's prized elephant! With leeches and revolution...

When Cam Jansen and her friend Eric uncover a mystery while selling fudge door-to-door to raise money for the local library, Cam uses her photographic memory to foil a crime.

Twelve-year-old Fin, a master thief from the pirate world of Khaznot Quay, and Marrill, also twelve, of Arizona, cross paths in the magical world of the Pirate Stream while on a quest for a mysterious map.

Birdie Gaux's dog, Bowser, considers himself in charge of security at 19 Gentilly Lane, so when the house is broken into Bowser wants to find the man with the limeade aftershave (and the cat) responsible--but nobody seems to know what the culprits were looking for, or why a strange girl is asking questions about Birdie's father, a policeman who was killed in the line of duty years before Bowser was adopted.

Their first trip to England brings twin sisters, Mia and Maddie, their first chance to be private investigators! There is pure excitement in the Glimmer family as the group heads to London to watch mom, famous singer Gloria Glimmer, perform. But on a day trip to the National Gallery, Maddie witnesses an art theft and takes her sisters and Miss Julia (their nanny) on a wild and crazy adventure as they follow the thief through London to his lair. Will...

Cam Jansen sets out to solve the mystery of Danny's parents' missing car before the famous mystery writer Jim E. Winter, who is signing books at the school, does.

When Cam and her father go to a talent show at the local senior center, Cam's help is needed to find out who stole a wedding cake from the delivery truck.

"Orphans Philippa, Sam, Thomas, and Max must find out who stole a valuable artifact in order to save to save their home, Dumfrey's Dime Museum of Freaks, Oddities, and Wonders"--