To unglue a book means that you buy the rights to the book and then pass them on by giving the book to the world for free to read in any e-book format and on any device – without DRM or time restrictions under a creative commons license. But you don’t do it alone. You chirp in a little and so does a lot of other people who think it is important to free the same book. This is called crowd funding. When you crowd fund (and unglue) the project you support has a deadline and the money needed must be raised before the end of this deadline or the project fails. If the money is not raised before the deadline – you don’t loose your money – because the amount you pledge is not drawn from your account unless all the money needed is raised.