the essence of presentation, 3Bs

I learned how to show the introduction of the book as a presentation.
the presentation that Dan showed was so clear. I am not good at this skill, so I will work hard!!!
3Bs
Background
Biography
Bias

In fact, I am hard to read OMS, because I read without thinking anything, just read, read, and read...
I want to look into about the author more, and read OMS with reminding of 3Bs so that I will be able to understand OMS clearer.