Twelve-year-old Teddy investigates when a popular Texas zoo's star attraction--Henry the hippopotamus--is murdered.

In Tarreton, where the rich have all the magic they wish and the poor can barely afford a spell to heat their homes, twelve-year-old Isaveth's father is accused of murdering an influential citizen and Isaveth, aided by eccentric street boy Quiz, tries to solve the magical murder mystery before her father is executed.

Gehennian Princess Lily of the Shadowlands, runaway Thorn (the woodcutter?s son), and hostage Prince K?Leef of the Sultanate of Fire share a common problem: they want nothing more than to be released from their obligations and see their families again. But Lily?s family was murdered, and she might be next, so she and the two boys, bound in different ways to serve Castle Gloom, work together to keep one another safe and try to literally unmask the...

When thirteen-year-old Logan and his family move into a run-down old house in rural Virginia, he discovers that a woman was murdered there and becomes involved with his neighbor Arthur in a dangerous investigation to try to uncover the killer.

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.

Detectives' Row is full of talented investigators, but Toby Montrose isn't one of them. He's only an assistant at his uncle's detective agency, and he's not sure he's even very good at that. Toby's friend Ivy is the best sleuth around -- or at least she thinks so. They both see their chance to prove themselves when the famed Hugh Abernathy announces a contest to choose the World's Greatest Detective. But when what was supposed to be a game turns into...

Twelve-year-old Jessie spends the summer with her family on Quicksand Pond, a New England vacation spot, where she develops a star-crossed friendship with independent Terri, and meets a reclusive old lady whose connection to a murder that took place decades ago still informs her present--and affects Terri in ways that Jessie gradually comes to understand the more time they spend together.

When someone commits robbery and murder aboard the luxurious train on which Myrtle Hardcastle, her Aunt Helena, her governess Miss Judson, and cat Peony are traveling, Myrtle is determined to find the culprit.

As he grieves his best friend Benny's death, Mason and his friend Calvin, who are targeted by the neighborhood bullies, create an underground haven for themselves, but when Calvin goes missing Mason finds himself in trouble.