Content writer for helping writing a nonfiction book

have started to write a book about a method that i invented
a method to enjoy the pain of a childbirth
make the pain a good experience
i need a content writing - ghost writer
that will help me to write it, so it will filled a book
and not be like an article
ofcourse the copywrites and sells will be mine
if you will continue with me to the end - i can add your name as a co-editor on the book
so you chould show it as a work experience
at first we will make a trial base for few hours
to see if we have chemistry
it is part time job - few hours a week , not a full time job