I read through some of the Beginner section that I thought seemed inappropriate for beginners and found a number of grammar and punctuation errors. While trying to navigate the file I found that the page numbering shown in the Table of Contents is off by two pages. His advice on "difficult people" sounds like he is talking about a single, specific person but is doing so in a vague way and expects that to function as actionable advice. That seems like a common pattern as I look back on the rest of the section. He talks about what were probably specific events or situations in a very non-specific way and by doing so falls short of providing useful insight. It would be more effective to write about the details than to try to adapt the story to a common experience.