Pro Git

It is very hard to make sense of git's interface and commands unless you have an idea how it works under the hood. The book explains it excellently.

So much this. I’d absolutely recommend everyone read the internals chapters, since they’re approachable and really give you a sense for how git thinks. I feel like after reading that chapter, all the superstition around git faded away for me

Pro Git(https://git-scm.com/book/en/v2). You'd be surprised how many people in our professional community try to get by in life having never just sat down and read the documentation on their tooling. Obviously the git man-pages are terrible enough that we have goofy parody generators, but its okay because this book exists.