An anonymous diary is a mystery with handwriting that is difficult to decipher. It is filled with technical drawings and chemical formulas. Was the destructive explosion an accident or an act of revenge?

When a puppy who is being trained as a police dog goes missing, third-grader Judy forms a detective agency to solve the mystery, imitating her literary heroine, Nancy Drew.

When Nancy Drew and her friends arrive at Misty Lake, they meet pretty, red-haired Cecily Curtis, who seeks Nancy’s help in solving two mysteries. One concerns Cecily’s fiancé, Niko Van Dyke, a popular singer who believes that his record company is cheating him of royalty payments. The other invovles a family treasure hidden before the start of the Civil War; Cecily’s only clue is half of a gold locket. Nancy’s investigations...

While solving the mystery of an old man's disappearing fortune, Nancy ends a family feud and reveals the identity of an orphan of unknown parentage.

Nancy Drew tries to find a clue to the strange tapping sounds in the house of a retired actress.

Nancy and her boyfriend Ned visit Coffin Hall to research the library's rumored ghost, but when a fire breaks out and Ned is blamed, it is up to Nancy to find the true culprit.

Nancy Drew's latest involvement in a mystery begins in her home town and concerns a synthetic sapphire with a spider embedded in it, and the strange disappearance of Ned Nickerson.

Nancy Drew and her classmates have the chance to submit their own fashion designs to a big-time competition, and the chance to model their designs in a fashion show. On a team with her best friends, George and Bess, Nancy comes up with some original clothing ideas and her team wins. But someone keeps trying to ruin the contest by stealing designs, hiding sample pieces, and tripping up the models. Can the clue crew find the culprit before the River...

A Civil War reenactment should be fun, right? Not in our town! It feels like war fever's taken over. The tension started to build when we all chose sides. Confederate and Union sympathizers never did mix. And if that wasn't enough to heat things up, someone started to secretly dig large holes in the battlefield. Pretty odd -- and very suspicious. Is someone waging a little war of their own, and trying to cheat? And if so, the bigger question is why?...

A bookstore fire seems suspiciously like the plot of a bestselling author's mystery stories.