Franklin W. Dixon

Frank and Joe Hardy have been invited to take part in a conservation mission by a marine biologist at the Bayport Aquarium. The boys get to go on an all-expenses-paid trip to the lush and beautiful Florida Keys to help save sharks....

Something is not right in Bayport. After a series of unfortunate (yet harmless) pranks, it looks like Frank and Joe have caught their suspect surprisingly early....

"Joe," I said, concerned, "hit the brake!" "I am," Joe said, pumping the pedal now. But the car didn't slow at all. The traffic light turned red as we hurtled toward the intersection....

"JOE!" Frank suddenly yelled behind me, but it was too late. A dark shape advanced on us from inside the doorway....

As I rounded the corner, I spotted Rick just ahead. He paused and bent down to poke at something on the ground by his feet, muttering something that I couldn't make out due to the wind....

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....

Frank and Joe investigate a supernatural crime in the 17th book in the thrilling Hardy Boys Adventures series....

Mr. Lakin gave the Don's boot a kick. The Don didn't move. Joe and I exchanged glances. Something was definitely not right. Joe knelt down and put his fingers on Don Sterling's neck....

Bayport High's Green Environment Conservation Club is camping on Black Bear Mountain. Not only does the mountain live up to its name - the fierce, furry animals are everywhere....

Brother detectives Frank and Joe search a hidden castle for clues to help them find a missing comic book in the 19th book in the thrilling Hardy Boys Adventures series....