"but I sense you are not a starter, now are you?"
What the hell is that supposed to mean?
What the hell is that supposed to mean?
Rephrasing: "but from what I can read, I guess you are not a newbie with Bootstrap nor frontend design (so the book is not for you)"
Your guess is wrong. If you had put the repositories and themes up on GitHub and dropped the price of the book to $20, I would have glanced at the ToC and most likely bought it.