After a dying criminal confesses that his loot has been stashed "in the tower", the Hardy boys make an astonishing discovery.,

America's Sherlock Holmes in sneakers continues his war on crime in ten more cases, the solutions to which are found in the back of the book.

"Todd's ears are so clogged up he can't hear, but he doesn't want to miss school. His teacher, the ex-spy Mr. Merlin, is sure to have secret codes for the class to figure out and a new mystery for them to solve ..."

A hard-bitten former search-and-rescue dog helps solve a complicated missing chicken case.

Eighteen-year-old Grace spends her summer transcribing cassette tapes for the historical society in an attempt to escape her grief, but when she realizes she can communicate with Jake Underwood, the boy who recorded them in 1992, through the tapes, she becomes drawn into a mystery involving a hurricane and a tragic death.

Students from an elite prep school travel to a remote ski cabin for their senior excursion, but as the temperature drops and a blizzard traps them inside, tensions rise, secrets and betrayals are revealed, and when classmates begin to die, the group must uncover the killer among them to survive.

America's Sherlock Holmes in sneakers continues his war on crime in ten more cases, the solutions to which are found in the back of the book.

Summer vacation on an almost private island gives the Aldens a challenge. Henry, Jessie, Violet and Benny used to live alone in a boxcar. Now they have a home with their grandfather and are spending the summer on their own private island. There is a mysterious stranger on the island with a secret--but that's not the only surprise in store for the Boxcar Children.

"Drop case or else danger for you and your family." This warning addressed to Fenton Hardy not only alarm the famous investigator and his detective sons, but also puzzles them, because Mr. Hardy is working on more than one case. Which one prompted the threat? When more ominous warnings follow, Frank and Joe suspect there is a link between the counterfeiting case they are investigating and a secret case their father cannot discuss since it involves...

"Someone knocked out Todd and Noelle's friend Pops Verner, the night watchman at the department store, and stole his treasured pocket watch. He's pretty sure the robber is one of the three men who work in the storeroom. But how can he figure out which one ..."--Cover back.