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Goodreads asked Sue Barr:

What mystery in your own life could be a plot for a book?

Sue Barr I'm glad you asked because I DID have a mystery (which has never been solved) and I wrote it into my book According to Plan.
The phone rang early one morning and when I answered, all I heard was a digital voice saying, "Enter the four letter password into your computer now". This stayed with me and when I wrote According to Plan, starring an undercover Federal Agent and his estranged wife, a P.I., it seemed fitting that he would receive a message exactly like that from a deep, deep undercover associate.

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