The son of Curtis Mayfield talks about Aretha Franklin's Chicago connection in recording the Sparkle album at Chicago's Curtom Studio's. Mr. Mayfield had his main office on 85th & Stony Island
The book Traveling Soul: The Life Of Curtis Mayfield
https://www.amazon.com/Traveling-Soul-Life-Curtis-Mayfield/dp/1613736797/ref=sr_1_1?ie=UTF8&qid=1534603971&sr=8-1&keywords=traveling+soul+the+life+of+curtis+mayfield
https://www.barnesandnoble.com/w/traveling-soul-todd-mayfield/1123528097?ean=9781613736791&st=PLA&sid=BNB_DRS_New+Core+Shopping+Books_00000000&2sid=Google_&sourceId=PLGoP211428&gclid=EAIaIQobChMIvbv3iej23AIViIWzCh1v3w45EAQYASABEgI9rvD_BwE