The Monks' 1964–1965 demos were professional studio recordings that preceded the album Black Monk Time. These have been released 3 times, all also including two tracks from a single by The Five Torquays (the band's name before transforming themselves into the Monks).
Five Upstart Americans is the first release of earlier demo versions of songs from Black Monk Time, plus other previously unheard songs. It was released on CD in 1999 by Omplatten, Ltd.
Demo Tapes 1965 is the second release of the demos and was issued in Europe with a different track order, as well as an additional bonus track from a tribute album in 2007.