If you were born on Sunday, October 24, 1943 then You Light Up My Life by Debby Boone was the number one on your 34th birthday, and went to number one on October 09, 1977. Check the price of You Light Up My Life by Debby Boone on Amazon.com
The biggest selling book of 1977 (the year you turned 34) was The Silmarillion by J.R.R. Tolkien and Christopher Tolkien.