What's a UBook, Anyway?
According to Black and White Publishing, UBooks are:
Books on video, where the words appear on the screen at reading pace. Most are enhanced with music. Some are narrated. Because they’re free—gotta love Youtube—they’re the perfect medium for shorter pieces. Can you see the possibilities? And because Ubooks are a seamless reading experience with musical enhancements, they’re not only free, and on a medium people are familiar with, they’re a better product.