The Hardy boys find the missing deed to an Indians' land, prevent a phony salesman from carrying through a reckless scheme, and help their father solve a top-secret case.

The Hardy boys embark on another puzzling mystery when they try to discover who is stealing rare collections of ancient pirate treasure and smuggling them out of the United States.

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

While having breakfast at their favorite diner, two detectives, Bunny and Jack, solve a mystery that is not what it seems.

After capsizing her rowboat on Twin Lakes, Nancy Drew sets out to help the girl who saved her life investigate the mysterious events surrounding a deserted bungalow.

The Hardy boys dial a wrong number, get the Pentagon, and suddenly find themselves in a dangerous adventure involving national security.

Dink, Josh, and Ruth Rose investigate a mysterious man in black who Josh believes is a vampire.

Nate the Great interrupts his backyard vacation to find his friend's lost grocery list--before lunch.

When one of their tightly-knit group mysteriously disappears, four high school girls find their friendship difficult to maintain when they begin receiving taunting messages from someone who seems to know everything about their past and present secrets.

Summary: Asked to locate a stolen necklace of unusual value, Nancy soon discovers that strange and dangerous people are responsible for the theft.