When it comes to that matter I recommend Dale Carnegie "How to Win Friends and Influence People" (https://en.wikipedia.org/wiki/How_to_Win_Friends_and_Influence

When it comes to that matter I recommend Dale Carnegie "How to Win Friends and Influence People" (https://en.wikipedia.org/wiki/How_to_Win_Friends_and_Influence_People https://en.wikipedia.org/wiki/How_to_Win_Friends_and_Influen..., it's in the public domain: https://archive.org/details/BooksOfArslanhowToWinFriendsAndInfluencePeople https://archive.org/details/BooksOfArslanhowToWinFriendsAndI...). I read it half a year ago and I regret not reading it earlier (don't be dissuaded by its title!).