This book expounds on the comforting reality of God being sovereign over disability, and how it's specifically purposed by him to give us the best thing for us: a greater delight of Jesus.
This book is simplistic, so it's perfect for a short read through with children. Yet, the Scriptural truths are meaty enough for adults.
There's also a powerful section in the back written by the author's mother. There, she talks about the difficulties of raising up a disabled daughter, but rejoices through it; God gave her sufficient grace, and used her daughter's disability to put his glory on display.