Penguin Group’s self-publishing service, Author Solutions, is being sued, Courthouse News Service reported earlier this week. The complaint by three authors states that Author Solutions cheated them out of royalties and charged them for typos that were inserted by the company. There was an interesting passage in the Courthouse News Service article that gave financial and statistical information about Author Solutions. "Author Solutions' revenues are estimated at $100 million per year," the complaint states. "Of the $100 million Author Solutions earns as revenue, approximately one third of that amount, or millions annually, comes from book sales. The rest of its revenue is derived from...