Hi Marc, When we first created Soulful Detroit, our very first tour was the Soulful Detroit Tour. This is the 'crown jewel' tour of what was determined to be the most significant sites of the "motown" era recording era, of which Motown is just one.
http://www.soulfuldetroit.com/web01-...oit/index.html

We also created a clickable map to accompany the tour. http://www.soulfuldetroit.com/maps.htm

Take that tour and you will graduate from Detroit Soul 101.

The book "Before Motown" by JimG will fill you in on the history prior to that.