If you were born on Monday, August 12, 1940 then Tossin' And Turnin by Bobby Lewis was the number one on your 21st birthday, and went to number one on July 09, 1961. Check the price of Tossin' And Turnin by Bobby Lewis on Amazon.com
The biggest selling book of 1961 (the year you turned 21) was The Agony and the Ecstasy by Irving Stone.