Mary Higgins Clark – $140 Million

Mary Higgins Clark grew an impressive $140 million fortune through her hard work as an author. Some of her most popular books were On the Street Where You Live and Before I Say Good-bye. Prior to her success in writing, he has worked several normal jobs.

She was a copy editor, a secretary, and even a flight stewardess. She retired from those jobs because she wanted to focus on her family. Writing became a way she can continue to earn while still making motherhood her top priority. Back in January 2020, she passed away at 92 years old.