At the professional writer lunch today, a lot of the conversation on writing turned to how the industry is changing, bookstores, and so much more about the future. Great conversation. And tonight on a nifty program on the Travel Channel, I learned a little about how books were sold door-to-door after the Civil War and up into the last century. It was a major way books were distributed, and publishing company sales forces were basically door-to-door salesmen. When I came into the business in the early 1970s, the major publishing sales force had morphed into selling to bookstores, and only encyclopedias were sold door-to-door. Wow, has publishing changed. (grin) Now…