I'll add Ra by Sam Hughes (qntm.org) https://www.amazon.com/Sam-Hughes/e/B07M92WWT7/ref=dp_byline_cont_ebooks_1 https://www.amazon.com/Sam-Hughes/e/B07M92WWT7/r

I'll add Ra by Sam Hughes (qntm.org) https://www.amazon.com/Sam-Hughes/e/B07M92WWT7/ref=dp_byline_cont_ebooks_1 https://www.amazon.com/Sam-Hughes/e/B07M92WWT7/ref=dp_byline...