E. L. Konigsburg, who won the American Library Association’s John Newbery Medal for From the Mixed-Up Files of Mrs. Basil E. Frankweiler (one of my all-time favorites), has died in Falls Church, Virginia, at the age of 83.

Konigsburg attended Carnegie Institute of Technology in Pittsburgh with a major in chemistry and wrote 20 books, half of which she illustrated herself. [NYT]