Theres no such books, only books discribing how a cult work, simply because this is more of a gift, a talent, something you born with.In my experience in the matter, after years of studying, I can say that the first step for anyone who wanted to start a cult is to be extremely persuasive and convincing about what preaches. And it must also at the same time concealing devotion and above all, know how to find the weakest people, those who have feelings of low self esteem and complexes of inferiority unresolved or untreated, these will be those that will follow you more fervently, believe in everything you say and even come to believe that you are some sort of God.