It's Book Business Friday. Calm...we must stay calm...breathe in...breathe out. The battle in the e-book reader world is heating up. Apple, Amazon, publishers, authors, illustrators, readers--they all have competing interests in this developing literary medium. How much is a digital book worth? How does that influence the value of a hardcover or paperback book? How much will our royalties be? What will the book of the future contain beyond text? Read about it here. And here.