Growing up in Ladora, Iowa, Mildred "Millie" Benson had ample time to develop her imagination and sense of adventure. While still a journalism graduate student at the University of Iowa, Millie began writing for the Stratemeyer Syndicate, which published the phenomenally popular Hardy Boys series, among others. Soon, Millie was tapped for a new series starring amateur sleuth Nancy Drew, a young, independent woman not unlike Millie herself. Under the pen name Carolyn Keene, Millie wrote the first book, The Secret of the Old Clock, and twenty-two other Nancy Drew Mystery Stories. In all, Millie wrote more than a hundred novels for young people.

Millie was also a journalist for the Toledo Times and the Toledo Blade. At sixty-two, she obtained her pilot's license. Follow the clues throughout Missing Millie to discover the story of this ghostwriter, journalist, and adventurer.