I have two self published Christian nonfiction books on amazon; ebooks and paperbacks. I do not have the time to market these books. I have an $800 budget to spend on marketing and promotion. I tried to advertise ebook on Bookbub and ereader news today but my books did not meet their criterias. What effective services would you suggest I purchase? I hope to hear from you soon. They are self help or Christian counseling books.