I am working through the second edition of this book by Scott Chacon and Ben Straub.
I have printed out the first 100 pages of the book1, and conducted an inspectional reading (in Mortimer J. Adler's sense of the word).
Deep Work 1: Git Basics, Git Branching.
getting started
"Deep Work: Professional activity performed in a state of distraction-free concentration that pushes your cognitive capabilities to their limit." —Cal Newport