Say you were a publisher and you were contemplating your electronic future. A new survey by the Pew Research Center tells you that more than one-in-five U.S. adults has read an e-book at some point, and that 15 percent of U.S. readers are reading an e-book on any given day, four times the number who were e-reading two years ago. What’s more, all that e-reading seems to be spurring people’s appetites for books of all kinds, both print and electronic, causing them to buy, borrow and read more of both. How should you try to shape the future of the e-book business? Should you hold firm to the agency pricing model that gives you control over e-book retail pricing, even at the risk of anti-trust litigation, or should you cede control over pricing to the market, avoid litigation and hope it leads to more e-book reading overall? According to the Wall Street Journal this morning, the Justice Department is pushing publishers, as well as Apple, to tear up their agency pricing deals and let retailers set their own e-book prices, or slse face litigation. Decisions, decisions.