The robbery of the treasure in the tower proves to be an exciting challenge to Frank and Joe. Frank and Joe attempt to foil a ruthless espionage ring in their effort to sabotage the United States space program.

The Alden children, isolated in a storm at a small bus station, are led into a mystery centering on a polluted river.

When a sinkhole opens up and swallows one of Bayport?s historic statues, Frank and Joe suspect something?or someone?shady at play. They jump at the chance to investigate; Joe as a member of an urban exploration club, and Frank as photographer for the school paper. But in the thick of their search, the boys stumble upon an entire underground city that?s been abandoned for years. Now the city is home to a cultish band of criminals who plan to take over...

It’s been almost two years since Simon died in detention, and the aftermath has been hard to shake. First the Bayview Four had to prove they weren’t killers. Then a new generation outwitted a vengeful copycat. Now the entire Bayview Crew is back home for the summer, and everyone is trying to move on. Only, this is Bayview, and life is never that simple. At first the mysterious billboard seems like a bad joke: Time for a new game, Bayview. But...

Told in two voices, a seventeen-year-old battered and bruised girl struggles to remember who she or the man claiming to be her father is while seventeen-year-old Drew stops at nothing to find his missing girlfriend.

The election celebrations of a new Kalamazoo City mayor are overshadowed by a crime spree and the activities of a mysterious hulking creature that are baffling detectives Zengo, O'Malley, and Cooper.

"In her chapter book debut, Nancy Clancy must find the culprit when a prized possession goes missing at school"--

Sophie Johnson is on the case to find the Lion's missing tail, but she is so focused on rounding up suspects that she is missing her puppy (and new assistant) Bella's true detecting potential.

While on a school trip to the British Arts & Antiquities Museum, John Watson and his friends from the Baker Street Academy get involved in a mystery when the Alpine Star, a famous diamond, is stolen.

Teenaged detectives Joe and Frank Hardy uncover a plot to sabotage a ski resort.