Do you need a book for that? Why not just be nice and trustworthy to your existing friends and strangers?
The books like How to Win Friends and Influence People: Dale Carnegie and 7 Habits of Highly Effective People: Stephen Covey show you how to be nice.
In Covey's book, he explain about habits 4, 5, 6 which are think win-win, seek first to understand, than to be understood, and synergize. These are interpersonal habits that can be applied to most of common situations.