If you were born on Sunday, October 24, 1943 then Saving All My Love for You by Whitney Houston was the number one on your 42nd birthday, and went to number one on October 20, 1985. Check the price of Saving All My Love for You by Whitney Houston on Amazon.com
The biggest selling book of 1985 (the year you turned 42) was The Mammoth Hunters by Jean M. Auel.