OK mystery- probably pretty good, but I didn't really pay proper attention to it. Interesting setting, historic home that is open to tours, and so on. Maybe the next will really catch me.
Pretty interesting run-through of many of the great songs-about-a-girl, and what really happened. 
A weak entry in the Nancy Drew series. Refugees from the bizarrely named Centrovia make up most of this rather messy plot, with jewels smuggled in thickly painted sections of paintings of ballerinas, and real ballerinas' slippers being stolen, and just a lot of confusion, but Nancy dances her way through and saves the day.
One of my favorites!!! The mysterious Mrs. Channing has scammed loyal Hannah Gruen by selling her a good mink stole cheap, and no-good stock certificates that are valueless!
Pretty silly one, but this time globe-trotting Nancy Drew helps a batch of archaeologists solve a deep dark mystery in Mexico, involving obsidian keys, treasure, and so on.
Pretty bad one, involving gypsy violinists, kidnappings, doll collecting, and other such unsavory things.
Nancy (and Bess and George) help old Mr. March recover the rights to music his dead son wrote, that will help support his daughter, and Nancy gets weirdly involved with people who make dresses out of spider silk (?), while pretending to be friends with snobby bitch Diane Dight. 
The introduction of the long-suffering Ned Nickerson, the Emerson College football player!!!
Nancy goes to Arizona!!! And, this book has the first appearances of Bess Marvin and George Fayne, who remain Nancy's besties for the rest of the books. Helen Corning has disappeared, presumably to marry her fiance, and is never heard from again. 
Nancy Drew #2, in which we meet Helen Corning, a close friend of Nancy's who completely dissapears in later books. The hidden staircase, many people's favorite Nancy Drew, has Nancy and Helen helping Helen's Aunt Rosemary deal with rumors that her mansion is haunted.
