Book about winged boy who befriends two children?

Question

I read this book when I was younger. I think it was an older book, but I’m not sure. In the book, a brother and a sister live with a mom who works all the time. They meet a boy with wings / who can fly. He takes them to a sky kingdom (or something like that) and they meet a lady who makes fabric out of the night sky. Does anyone know what this book is? I would really appreciate it! Thanks!!! :)

Answer 1

Could it be the novel 'Skellig' by David Almond?

From wikipedia:

10-year-old Michael and his family have recently moved into a house. He and his parents are nervous, as his new baby sister was born earlier than expected and may not live because of a heart condition. When Michael goes into the garage, he finds a strange emaciated creature hidden amid all the boxes, debris and dead insects. Michael assumes that he is a homeless person, but decides to look after him and gives him food.

Meanwhile, his friends from school become more and more distant as Michael stops attending school and spends less time with them. He meets a girl named Mina from across the road and over the course of the story they become close. Mina is home-schooled and enjoys nature, birds, drawing and the poems of William Blake. Often drawing or sculpting at home, she invites Michael to join in. She takes care of some baby birds who live in her garden and teaches Michael to hear their tiny sounds. Michael decides to introduce her to the strange creature. Michael's friends, Coot and Leaky, become skeptical about Michael and try to find out what he is hiding from them. Michael and Mina try to keep it a secret from them, and have to move "Skellig" to a safer space.

The creature whom Michael had moved from the garage—revealing a pair of wings at his shoulders—introduces himself as "Skellig" to Michael and Mina.

Answer 2

The Wind Boy by Ethel Cook Eliot