https://www.stat.purdue.edu/~qfsong/teaching/525/book/Weisberg-Applied-Linear-Regression-Wiley.pdf $0
https://www.amazon.com/Applied-Linear-Regression-Probability-Statistics-ebook/dp/B00GY2UPAS/ref=tmm_kin_swatch_0 $130 Kindle textbook
Textbook for Yale S&DS 3120 Linear Models