Here’s a blog post from Nathan Henrion, a midlist publisher who made a title available on Amazon as a free e-book. He reported seeing the sales rate of the second and third books in its series increase at a rate of 20 to 1. He says that digital sales make up 1/5 of the total sales of this particular series so far, and are growing. Henrion writes: Much of the talk by the big 6 publishers has been stress over cannibalization of print sales, or the idea of replacement sales, by ebooks. For midlist...