"What Happened At Midnight" is an exciting mystery novel by Franklin W. Dixon. The story revolves around the adventures of the Hardy Boys, Frank and Joe, who are skilled amateur detectives always eager to take on challenging cases. The plot begins with the Hardy Boys receiving a mysterious message requesting their assistance in solving a perplexing and dangerous case. Intrigued, they set out to unravel the enigma and uncover the truth behind the strange events that occurred at midnight. As the brothers delve deeper into the investigation, they encounter a series of thrilling escapades and encounters with suspicious characters. From hidden passages to cryptic clues, the Hardy Boys use their intelligence, bravery, and quick thinking to navigate the twists and turns of the case. As the story unfolds, the brothers find themselves entangled in a complex web of deception and danger. They must rely on their detective skills and work together to decipher codes, follow leads, and uncover hidden secrets. Throughout their quest for the truth, the Hardy Boys face various challenges, including narrow escapes, daring rescues, and unexpected revelations. With every clue they uncover, the mystery deepens, and the stakes become higher. In their relentless pursuit of justice, Frank and Joe race against time to solve the puzzle before the clock strikes midnight once again. The climax of the story is filled with suspense and excitement, as the Hardy Boys finally uncover the truth behind the mysterious events that took place in the dead of night. "What Happened At Midnight" is a thrilling and engaging mystery that keeps readers on the edge of their seats from start to finish, showcasing the bravery and resourcefulness of the Hardy Boys as they solve yet another intriguing case.

Frank and Joe solve the mystery of the secret locked room in the spooky Dalrymple Mansion.

Brother detectives Frank and Joe face the dangers of Black Bear Mountain once again in the twentieth book in the thrilling Hardy Boys Adventures series. Frank and Joe are back on Black Bear Mountain, the scene of a previous wilderness adventure and mind-bending mystery. This time, the brothers are checking in on Dr. K, a friend they made during their first trip. Dr. K is a fan of living off the grid, but he’s been MIA long enough to cause worry in the small mountain town. And so the teenage detectives Black Bear Mountain relied on before have been called in to help once again. It’s not a good start to the investigation when Frank and Joe’s ATV is put out of commission by a falling tree. Then their camp, including their radio—their only way to contact the outside world—is destroyed by wildlife searching for food. And when they finally reach Dr. K’s research station, they find his cabin has been cleaned out and abandoned—the only current resident is an angry skunk. Frank and Joe may have been better prepared for their second Black Bear Mountain adventure, but they’re not having any more luck this time around. In fact, they’ve been downright unlucky. Is someone trying to sabotage their mission? And if they are, how can the brothers stop this invisible foe?

While trying to help Annie Shea, the pretty new girl in town, Joe accidentally runs down her old boyfriend, Phil.

When A.T.A.C. agents across the country start getting strange and bizarre cases, it's up to Joe and Frank Hardy to find the computer hacker responsible! Anyone smart enough to break into A.T.A.C. security certainly has the skills to make things difficult for the Hardy Boys – even in what seems to be the empty Bayport High School in the middle of the night. But even the Undercover Brothers will be surprised when they uncover their adversary's true identity! With cameos by Lindsay Rider, the Sisters Noir, and Dennis Hogan, this special case involves a list of suspects that includes almost everyone the Hardy Boys have ever met!