Honestly, I think you might be missing something here. "Azimov on Numbers" was maybe the most real math book I read as a kid. I don't know of any other book aim

Honestly, I think you might be missing something here. "Azimov on Numbers" was maybe the most real math book I read as a kid. I don't know of any other book aimed at a kid's reading level that covers aleph-null and Cantor sets.