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