Thanks, but no need, I'll find it eventually. It was mostly good because it quoted Ellery Queen(who was a famous mystery writer) and his essay about how he became a mystery writer.
http://www.archive.org/stream/scriblio_test_044/scriblio_test_044_djvu.txt
This essay in question. Starts with "Dear Reader:
This is one of the Queens speaking . . .
I want to tell you the unforgettable circumstances that led to my
first meeting with Sherlock Holmes. "
It's totally worth reading.