I have given some people your book on Soft drinks.

Answer

The information provided in our two booklets on the topic of soft drinks is more than adequate for a sincere seeker of the truth. Those who do not want to accept the Haqq are like shaitaan. Despite Allah Ta'ala having directly spoken to him, shaitaan refused to be convinced, hence he was transformed into Iblees. Your obligation is only to proclaim the truth. You cannot convince the miscreants. Leave them. Do not knock your head in a wall. It is futile and negative to discuss with morons.