What are some sensible books about selling IT services on foreign freelance exchanges?

Question

Upwork

How to sell on the stock exchange and present the company's product, how to negotiate correctly.

Answer 1

There are no such books, this is direct marketing essentially based on your competence and name.

Answer 2

There are definitely no Russian-language books, although there are English-language ones, they are mostly written by beginners and quickly become out of date.
The main skill is the ability to communicate with a client and sell yourself profitably. I read the blogs of successful freelancers and try to find interesting and useful moments in their communication with the client.