Who would be contributing to this Kickstarter? People who already know her, and know that her books are good? That's not where the real money is, or the measure

Who would be contributing to this Kickstarter? People who already know her, and know that her books are good? That's not where the real money is, or the measurement of market value of an author's labor; the money is in the flow of cash from consumers. More generally, non-excludable goods do not work well within a free market system. If you want them produced, you either set up a state mechanism for funding them (which many countries do for e.g. film, by creating national film funds), or you somehow make them excludable (e.g. through copyright). The other options aren't really effective.