Beloved comic-book author Harvey Pekar has died at age 70, the Associated Press reports. Police found Pekar dead after being called by his wife to their Cleveland home. Details on the cause of death have not been announced pending an autopsy. He was reportedly ailing, with conditions including prostate cancer, asthma, high blood pressure, and depression.

Beginning in the 1970s, Pekar’s autobiographical American Splendor series attracted a growing cult following, ultimately helping change the way comic books were perceived. They were adapted into the 2003 film American Splendor, starring Paul Giamatti as Pekar.