One of the funkiest and most inventive organists to ever walk the earth, Dr. Lonnie Smith made his name on Blue Note beginning with his 1968 label debut Think! Produced by Francis Wolff, the album featured trumpeter Lee Morgan, tenor saxophonist David Newman, guitarist Melvin Sparks, and drummer Marian Booker Jr., with Henry "Pucho" Brown, William Bivens, and Norberto Apellaniz adding percussion on two tracks. Groove is the thing on this session from the hard-driving opener Song of Ice Bag written by Hugh Masekela to Doc’s laid-back original Slouchin’ to the band’s joyful romp through Aretha Franklin’s hit Think.