Book to explain autism to younger NT sibling

[Timepasses]

Hi

DS age 9 has ASD and DS6 has started asking questions about why his brother cannot talk etc.

Can anyone recommend a book to explain and help him understand.

Thanks all

Following

I see things differently

Actually I posted a bit quickly. I'm not sure it would be a good fit with a nonverbal child.

Not a book, I know, and possibly a bit young, but have a look at the Sesame Street clips about Julia on YouTube.