What other sites can you promote his books on? Look at what Roosh does, when he releases a book, he gives free copies to tons of bloggers, they write a review and link to Roosh's book.
You could try the same, get in touch with bloggers in the same field and offer them the book for free in exchange for a review and a link.
You could try the same, get in touch with bloggers in the same field and offer them the book for free in exchange for a review and a link.