Carol Higgins Clark has been announced dead by the Appendix Cancer Foundation after she battled the disease for three years. She was 66 years old.

“ACMP is deeply saddened to report that the appendix cancer community has lost a dear friend, Carol Higgins Clark, to appendix cancer. Carol was a strong supporter of our mission to fund appendix cancer research to discover new treatments and find a cure,” Appendix Cancer Research Foundation wrote.

According to sources, she died in New York on Tuesday, June 12, 2023. She was an American author and actress, born to famous writer, Mary Higgins Clark. While attending Mount Holyoke College, she began re-typing her mother’s transcripts and also made contributions such as renaming locations and characters.

“Devastated to hear that my dear friend and colleague Carol Higgins Clark died after bravely living with appendix cancer for the past three years. Here hoping she and mom are sharing a bottle of wine together,” Harlan Coben wrote.