― Guest post by Seth Godin ∙ For books under $20 (which means just about all ebooks), all that matters is volume. Not margin, but volume. ∙ A book in the hand of a reader is far more likely to lead to another book sold. Bestsellers become bestsellers largely because lots of other people are already reading them. ∙ I know that sounds silly and self-referential, but it reflects the social nature of books. We like to read what others are reading. ∙ So, if you sacrifice [...].