The sad news of Jan Berenstain's death at 88 has me reminiscing on my buddies The Berenstain Bears today. Cause of death: stroke . Jan Berenstain in 2011. Jan Berenstain died of a stroke on February 24, 2012. But I'm not as nice or stalwart." Photograph: AP. Author, Illustrator. Stan and Jan Berenstain created hundreds of books until Stan Berenstain's death in 2005 at the age of 82 . Stan and Jan Berenstain created hundreds of books until Stan Berenstain's death in 2005 at the age of 82. His elder brother, writer Leo Berenstain, is involved with the business end of … JAN Berenstain, who with her husband, Stan, wrote and illustrated the Berenstain Bears books that have charmed preschoolers and their parents for 50 years, has died at the age of 88. Stan and Jan Berenstain created hundreds of books until Stan Berenstain's death in 2005 at the age of 82. PHILADELPHIA (AP) — Jan Berenstain, who with her husband, Stan, wrote and illustrated the Berenstain Bears books that have charmed preschoolers and their parents for 50 years, has died. After Stan's death, she worked on the books with her son Michael. Mike Berenstain is an illustrator who collaborated on the books with his mother in recent years. Mike Berenstain is an illustrator who collaborated on the books with his mother in recent years. Selected works. Mike Berenstain is an illustrator who collaborated on … Seuss, whose real name was Theodor Geisel, was the … Soon, Jan and her husband had created a successful franchise which, over the years, resulted in more than 300 titles released in 23 languages. Stan and Jan Berenstain created hundreds of books until Stan Berenstain’s death in 2005. Mike Berenstain is an illustrator who collaborated on … Jan Berenstain and her husband, Stan, published their first Berenstain Bears book in 1962. Stan and Jan Berenstain created hundreds of books until Stan Berenstain’s death in 2005 at the age of 82. She was 88. In an interview with "The Washington Post," she once admitted that Mama bear was "based on me.