"The Secret of the Old Clock" by Carolyn Keene

What is your experience reading "The Secret of the Old Clock" by Carolyn Keene?  Is this the first time you are reading it? Or did you read it in your childhood? Does the story 'hold up' after all this time?

For information about the Nancy Drew series, check out:
http://www.series-books.com/nancydrew/nancydrew.html

For information about Mildred Wirt Benson, (who wrote 23 of the first 30 original Nancy Drew books), check out:
http://articles.latimes.com/2010/mar/28/entertainment/la-et-story28a-2010mar28

For information about the Stratemeyer Syndicate, and Edward Stratemeyer, who created many childhood book series of yesteryear, check out:
http://childrensbooks.about.com/b/2003/08/08/much-like-nancy-drew.htm

For information about "The Secret of the Old Clock" and its revisions, check out:
http://en.wikipedia.org/wiki/The_Secret_of_the_Old_Clock