I just published my crochet patterns for Nook this week and sold a few already. But I have been promoting on Facebook, Twitter and other places where I find crocheters lurking. I would not rely on someone finding your book on here just scrolling through the selection. The key is finding your audience and promoting to them. Maybe advertise to schools librarians for your type of book. They recommend what to read to kids all the time. Many kids received the nook for Christmas and are looking for good books to download.