Yeah, I found the book in Amazon for under $20. I might just get it today. My girlfriend picked up a beginners book with her bass the same night I picked up my guitar and she's been learning a lot from the book, especially reading music.
edit: here's the book in Amazon.
Justin Guitar website and youtube is incredible. He is pretty much universally loved over on r/guitar and has a wonderful program for complete beginners up through intermediate to advanced players and almost everything is free. Register for his website (free) and start with lesson one (dont skip them even though you might have picked up 90% of the really early stuff by just being around a guitar player) and progress through slowing down as needed to get the lessons down. (Also advice from me is to get as thin a pick as you can to start out with, it makes learning to strum a ton easier) https://www.justinguitar.com
Also here is a copy of a beginner songbook which has a lot of the same material you can get for free on the website if money is tight but it is nice to have it in front of you in text while you are learning. https://www.amazon.com/Justinguitar-com-Beginners-Songbook-Guitarists-Performance/dp/1780387105/ref=tmm_other_meta_binding_swatch_0?_encoding=UTF8&qid=1617894908&sr=8-3
If you have any other questions feel free to pm me.