She was followed in 1932 by Judy Bolton, a more realistic young woman who matured over the life of the series. The first book, The Vanishing Shadow, was based on the author's experiences during the Austin (PA) flood of 1911. Judy's life is full with a brother, two parents and two serious suitors, and she eventually marries in book 10, The Riddle of the Double Ring. And unlike Nancy, Judy was written from start to finish by her creator, Margaret Sutton.
Now Applewood Books, which resurrected the old Nancy Drews, has begun to republish the Judy Bolton series, complete with original cover art and illustrations by Pelagie Doane.
While the first 20 are now available in paperback at $14.95, you also may find some stores carrying the Judy Bolton Set (five hardcovers at $60). If you've done the math, the set of five hardcovers saves you $15 over the price of the first five paperbacks.
It doesn't take an amateur detective to figure that one out.