E.L. Konigsburg, an author who twice won one of the top prizes for children’s literature, has died at age 83.

Her son Paul Konigsburg says the author died Friday at a hospital in Falls Church. She had been living in Northern Virginia for the past few years, he said.

E.L. Konigsburg won the John Newbery Medal in 1997 for her book “The View From Saturday” and in 1968 for “From the Mixed-Up Files of Mrs. Basil E. Frankweiler.” Her family says she wrote 16 children’s novels and illustrated three picture books.

Her first book, “Jennifer, Hecate, Macbeth, William McKinley, and Me, Elizabeth” was a Newbery honor book in 1968.

She told the Dallas Morning News in 2004 that she built characters and plots by imagining situations with her children, grandchildren and students.

Author E.L. Konigsburg won two Newbery Medals and wrote 16 children’s books. (Associated Press)

“I think most of us are outsiders,” she said. “And I think that’s good because it makes you question things. I think it makes you see things outside yourself.”