I absolutely adored the Wrinkle trilogy and for years had a ritual of rereading them every year. I should maybe get back into that. Very sad news.
Well, A Wind in the Door is definitely a sequel. The third book, A Swiftly Tilting Planet, is set a decade or two later, and I think was also written considerably later (the style is very different). But there are also other books associated with the Murray family: Many Waters stars Sandy and Dennis (the “normal” ones in the family), and there are a few featuring Meg’s children, written much later.
Certainly pick up A Wind in the Door, but the others don’t, I think, reach quite the same level of quality as those two.
It’s a small thing, but I remember reading a passage where Charles was trying to untie a wet rope from the unicorn, and L’Engle used the phrase “Make haste slowly.” It’s probably not original to her, but whenever I’m rushing and fumbling with something I remember her story, and follow the advice.
Augustus Caesar. One of his mottoes was “festina lente,” make haste slowly.
Hers was the first sci-fi I ever read and was hooked. I wrote her a letter in high school telling her how much I loved her books and to ask where I could buy prints of the cover art. She sent back a very short response saying she didn’t know. I also enjoyed Two-Part Invention and gave it as a gift to a marrying couple.
My favorite part was always the tesseract explanation. Although I didn’t 100% understand what a tesseract was, that conversation taught me the meaning and the feeling of the inferential leap. Though at the time I didn’t know what it was called.
I forget which of her books was badly done as an ABC TV-movie, but an interviewer asked her “Did it meet your expectations?”
Her response- “Oh yes, I expected it to be bad, and it was.”
Classic!
The Lord bless you & keep you, Madeline.
I am grateful for her years here, her wit and eloquence. I am glad she lived. I am also saddened to hear of her death. I hope it was peaceful. 
I know she went with Grace.
I know of her but have never read any of her works, so I think I will read A Wrinkle in Time as a tribute.
Autolycus, also read A Wind in the Door as well. It’s set not long after A Wrinkle in Time.
**A Wrinkle in Time **was the first book that I read that had spiritual concepts. I still remember reading where Mrs Whatsit turns into the centaur type being, and Calvin kneels to her. She gently rebukes him not to kneel to her. This provoked a long discussion with my mother (my family being atheists) on created and uncreated beings and the correct protocol of dealing with Deity(ies).
Fuck.
I’ll always remember we have something that IT has not.
Here’s a link to a thread Skald the Rhymer started about a year ago to discuss A Wrinkle In Time.
(And I notice that Skald has reverted to Guest status. 
Anybody know what happened to him?)
You could write a note to her family still.