Middle-schooler Madeline's hippy parents have been kidnapped from Hornby Island, Canada, by foxes and Madeline, upon discovering that she can understand animal languages, hires two rabbit detectives to find them.

When three leprechaun statues disappear just before St. Patrick's Day, Bradley, Brian, Nate, Lucy, and other friends follow clues in order to prove that Lucky O'Leary is innocent of the crime.

Dink, Josh, and Ruth Rose are enjoying a visit to San Francisco when Holden, their college-age tour guide, is accused of abducting Miss Chinatown from the Chinese New Year parade and stealing her valuable crown.

"When the Thea Sisters' friend Bridget returns to Scotland for a family emergency, the five mice offer to help. And when Bridget goes missing, they have to rush to Scotland to find her! Along the way, the Thea Sisters encounter Celtic legends, cryptic messages, and hidden treasures on a trip that's full of surprises!" -- p. [4] of cover.

The Aldens help out at a minor league stadium and investigate when it appears someone in the ballpark is stealing the home team pitcher's signals and relaying them to the batters of the other team.

The Titanic has hit the high seas--and moves steadily toward its doom. Within the luxury of the cabins and the dark underbelly of the ship, mysteries unfold--a secret killer who may be on board, a legacy that may be jeopardized, and a vital truth that will soon be revealed. For Paddy, Sophie, Juliana, and Alfie, life on the Titanic brings both hiding and seeking, as their lives become irrevocably intertwined. And then, of course, an iceberg appears,...

While Henry, Jessie, Violet, and Benny help a friend fix up an old mansion filled with skeletons belonging to the doctor who once lived there, statues begin disappearing from the mansion grounds and a walking skeleton may be the culprit.

On Halloween, Scooby-Doo and the gang are helping out with an auction in the fancy Brickstone Hotel. Things get batty when a vampire swoops in and steals a magical jewel from Transylvania.

Nancy arrives in Phoenix, Arizona, eagerly looking forward to a fun-filled vacation at Shadow Ranch, but abruptly finds herself involved in a baffling mystery. The ranch is being haunted by a phantom horse and maliciously damaged by an unknown enemy.

"Frank and Joe try to hit a home run by figuring out what happened to the Bayport Bandits' playbook before the first big baseball game in the second book in an all-new, interactive Hardy Boys chapter book mystery series. Includes space for readers to jot down their own ideas and solutions to the case! Frank and Joe and the rest of their Bayport Bandits teammates can't wait for Little League to start! Everyone is celebrating the beginning of the season...