3 Stars

The characters in this book are the same as A Wrinkle in Time. Other than that, the books do not overlap or have anything to do with each other. Both do have magical qualities and a tight family unit. While this story had a life learning altercation made for children, the storyline came up short for me. Sadly, I remember reading this has a young girl and loved it.
Poor Charles Wallace was not only bullied by kids but also by adults. A sound resolution was never compromised. I have purchased the five box set so will continue to read about Meg and Charles Wallace.
Back Cover:
A Wind in the Door is a fantastic adventure story involving Meg Murry, her
small brother Charles Wallace, and Calvin O’Keefe, the chief characters
of A Wrinkle in Time. The seed from which the story grows is a
rather ordinary situation of Charles Wallace’s having difficulty in adapting to
school. He is extremely bright, so much so that he gets punched around a lot
for being “different”. He is also strangely, seriously ill
(mitochondritis – the destruction of farandolae, minute creatures of the
mitochondria in the blood). Determined to help Charles Wallace in school, Meg
pays a visit to his principal, Mr. Jenkins, a dry, cold man with whom Meg
herself has had unfortunate run-ins. The interview with Mr. Jenkins goes badly
and Meg worriedly returns home to find Charles Wallace waiting for her.
“There are,” he announces, “dragons in the twins’ vegetable
garden. Or there were. They’ve moved to the north pasture now.”
Dragons? Not really, but an entity, a being
stranger by far than dragons; and the encounter with this alien creature is
only the first step that leads Meg, Calvin, and Mr. Jenkins out into galactic
space, and then into the unimaginable small world of a mitochondrion. And, at
last, safely, triumphantly, home.