If you wish to learn about business persuasion techniques then you can read e-books available on the Internet. There are many e-books on developing business techniques, persuasion powers, speaking skills and developing other personality traits which can help you to bring about long desired changes.
Whatever may be your business profession you need to deal with people and until and unless you can convince people you will find hard to carry your business. Two great e-books which can really make a difference for you are-’The Greatest Marketing Secrets of the Ages’ and ‘Steps to Setting Up a Successful Small Business’. They are wonderful books with complete knowledge that one could wish for.