"The photo on the card shows a boy who was found murdered, a year ago, on the grounds of a girls' boarding school in the leafy suburbs of Dublin. The caption says I KNOW WHO KILLED HIM. Detective Stephen Moran has been waiting for his chance to get a foot in the door of Dublin's Murder Squad--and one morning, sixteen-year-old Holly Mackey brings him this photo. "The Secret Place," a board where the girls at St. Kilda's School can pin up their secrets...

Bunny and Jack, animal detectives, investigate the disappearance of the balloons from the neighborhood toy store.

Cam uses her photographic memory to catch a thief disguised as a ghost.

A young Canadian visitor helps the Alden family solve a mystery involving a lost coin collection.

"A group of kids discovers they were cloned from the DNA of some of the greatest criminal masterminds in history for a sociological experiment"--

The Alden children start out on a one-day mountain climbing excursion that becomes very exciting. They unearth some mysteries and some treasure and have a good time in the process.

When a thief takes the box office money at the school play, Cam uses her photographic memory to solve the mystery.

Roger Mifflin, whom we met in the author's 'Parnassus on wheels, ' here keeps a secondhand bookshop in Brooklyn, N.Y. He takes in the young daughter of a friend to learn the book trade, and immediately a mystery develops.

After unscrupulous collector S. Wendell Palamino cons him out of a valuable baseball card, sixth-grader Griffin Bing puts together a band of misfits to break into Palomino's heavily guarded store and steal the card back, planning to use the money to finance his father's failing invention, the SmartPick fruit picker.

When a mysterious letter written in code arrives at King's house for his human, Kayla, he follows the trail of the person who left it.