E. L. Konigsburg was an American author and illustrator of children's and young adult literature. She was born in New York City in 1930 and grew up in small towns along the Erie Canal. Konigsburg attended Carnegie Mellon University and the University of Pittsburgh, where she earned a degree in chemistry.

After several years working as a science teacher and homemaker, Konigsburg began writing and illustrating children's books. Her first novel, Jennifer, Hecate, Macbeth, William McKinley, and Me, Elizabeth, was published in 1967 and earned her a Newbery Honor. She then achieved widespread success with her 1968 novel, From the Mixed-up Files of Mrs. Basil E. Frankweiler, which won the Newbery Medal, one of the most prestigious honors in children's literature.

Konigsburg was a prolific writer, authoring over 20 books during her career. Her books often featured young protagonists who grappled with complex themes such as identity, family, and growing up. Her writing was praised for its humor, intelligence, and ability to engage both children and adults.

In addition to her writing, Konigsburg was also an accomplished illustrator. She created the cover art for many of her own books as well as for works by other authors.

Konigsburg's literary achievements earned her numerous accolades, including the National Book Award and the Margaret A. Edwards Award for lifetime contribution to young adult literature. She was also named a Living Legend by the Library of Congress in 2000.

E. L. Konigsburg passed away in 2013, but her legacy lives on through her beloved books, many of which continue to be popular with young readers today. Her work has inspired generations of children to explore their own identities and to never stop asking questions.