https://www.legacy.com/us/obituaries/washingtonpost/name/elinor-horwitz-obituary?id=38574618
(with photo)

Elinor Lander Horwitz, 93, died on November 3, 2022 at her home at Ingleside at Rock Creek, in Washington, DC, after a recurrence of lung cancer. Born and raised in New Haven, Connecticut, she received her BA in English from Smith College in 1950 and remained a devoted alumna throughout her life. A Smith classmate introduced her to Dr. Norman Horwitz, a neurosurgeon, with whom she had a long and happy marriage for more than 62 years, until his death in 2012.

One of the winners of a nationwide competition, she designed a gargoyle for the National Cathedral. As a free-lance journalist, she was a prolific contributor on a wide variety of subjects to The Washington Evening Star, The Washington Post, The New York Times, and numerous national magazines. She also authored more than 10 books for children and young adults, including the classic "When the Sky is Like Lace," and three books on American folk art.. She served as a longtime board member of the ACLU of D.C. and was a staff writer and editor for the Defenders of Wildlife and the Association of American University Women magazines.

A beloved matriarch, she is survived by her children, Erica Horwitz of Scarsdale, New York, and Joshua Horwitz, of Chevy Chase, Maryland, and was predeceased by her son Tony Horwitz, a Pulitzer Prize-winning reporter, author, and historian. She is also survived by her daughters-in-law, Ericka Markman and Geraldine Brooks, her son-in-law, David Gordon, and seven grandchildren and four great-grandchildren to whom she was devoted. A private burial was held in New Haven, followed by a memorial service at Ingleside in early December.

Published by The Washington Post on Jan. 6, 2023.
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What I posted in 2019:

From Wikipedia:

"Horwitz is the mother of Pulitzer Prize-winning journalist and author Tony Horwitz and the mother-in-law of Pulitzer Prize-winning journalist and author Geraldine Brooks."

Me:

I only heard "The Strange Story of the Frog Who Became a Prince" once,
as read by the school librarian, but that was enough to make me snatch
it up when I found it about 30 years later.

It's a fractured fairy tale about an ordinary frog and a mischievous
but not-so-wicked witch.

From The New York Times Book Review:

"Now here's a great book. Here is a delightful story. Here is frogdom
at its finest. It's all about this really neat froggy-looking frog,
who's great fun and who really enjoys being a frog. And he meets this
witch who comes swimming across the pond wearing her swimming goggles
and carrying her soggy peanut butter sandwich. And she turns him into
a Prince, which he doesn't like being , because, as some of us know,
being a frog is a pretty good life. Anyhow, the story goes on, and it
has some mroe magic spells and some funny and warm and witty dialogue
and it all works out in the end, and I loved it."

- Kermit the Frog

https://www.etsy.com/listing/678420673/the-strange-story-of-the-frog-who-became
(some pages from "The Strange Story of the Frog Who Became a Prince")

About "When the Sky is Like Lace," illustrated by Barbara Cooney:
"What happens when it's bimulous and the sky is like lace? Strange and
splendid things! Otters sing, trees dance, and the grass is like
gooseberry jam. There's a special party that anyone can attend.
Anyone, that is, who knows the rules and isn't afraid of plum-purple
shadows, can cook spaghetti and would like to teach a new song to the
otters."

https://www.google.com/search?q=Elinor+Lander+Horwitz+books&tbm=isch&source=lnms&sa=X&ved=0ahUKEwizwo3ngfPgAhWumeAKHcWjDpgQ_AUICigB&biw=1920&bih=921&dpr=1
(book covers)

http://worldcat.org/identities/lccn-n79141221/
(more synopses)

https://www.goodreads.com/author/show/311333.Elinor_Lander_Horwitz
(reader reviews)

https://www.youtube.com/watch?v=MMEFESkqEQg
(short video interview from 2014)

https://www.google.com/search?q=Elinor+Lander+Horwitz&source=lnms&tbm=vid&sa=X&ved=0ahUKEwjthoW4gfPgAhXSpFkKHT07C0YQ_AUIEygA&biw=1920&bih=921
(a couple more videos, about her books)

WRITINGS BY THE AUTHOR:
Published by Lippincott, except as indicated:

The Strange Story of the Frog Who Became a Prince (juvenile),
Delacorte, 1971.
The Soothsayer's Handbook: A Guide to Bad Signs and Good Vibrations,
1972.
Communes in America: A Place Just Right, 1972.
Capital Punishment U.S.A., 1973.
Mountain People, Mountain Crafts, 1974.
When the Sky Is like Lace (juvenile), 1974.
Contemporary American Folk Artists, 1975.
The Bird, the Banner and Uncle Sam: Images of America in Folk and
Popular Art, 1976.
A Child's Garden of Sculpture, Washingtonian Books, 1976.
Madness, Magic, and Medicine: The Treatment and Mistreatment of the
Mentally Ill, 1977.
Our Nation's Wetlands, U.S. Government Printing Office, 1978.

On the Land: The Evolution of American Agriculture, Atheneum, 1980.
Sometimes It Happens, Harper, 1981.
How to Wreck a Building, Pantheon, 1982.