Author Notes It’s been eighteen years since I last published a novel. Much has changed. But honestly, much of the change was easy enough to anticipate. The Skyhunter drone described in David’s Sling in 1989 is now called a Predator. The online economy in that book is now called sss and eBay. The palmtop described in EarthWeb in 1999, used in the transformational event referred to in the story as the TopDrop, is now called a Samsung Galaxy. People still email to accuse me of having invented f*******:. They also email to ask for guidance on how to create a Decision Duel, perhaps the most important tech I ever described that was never built. Sometimes change is sudden—starkly nonlinear, like falling off a cliff. We all fell off such a cliff on November 8, 2016. Much of my work is near-term

