I could be really cruel and say that if you need a book to tell you how to shake hands and what to say, then you really shouldn't be in business.
But if you are new or young or introvert or whatever, I will give you the benefit of the doubt.
But how many of these authors practice what they preach?
Do a search yourself and tell me where the first face of someone you feel you could pick up the phone to appears in the results.
The hashtag videos are something that pop up from time to time. Question is - who decided what the hashtag should be and why are you taking part?