I love reading Nancy Drew books! I mean, who doesn't(I do not want you to answer :) )?! But there are somethings that most people do not know about the series:
In 1959, the Nancy Drew mysteries were revised and shortened. The ones that people buy at book stores and such, are the 1959 edition. Carolyn Keene never was or is a real person. She is a pseudonym created by the company Nancy Drew was first published by. If she were real, she would be between 90-something and 100! The first "Carolyn Keene" was Mildred Wirt Benson.
I am pretty sure that the only original Nancy Drew books available are from Applewood Books and on Ebay.