At Bubonicon, they had a panel about time travel. Folks brought up issues like would you change the past? Most authors on the panel said, ‘No’, as they worried of unforeseen consequences. But what if you had a prediction capability to tell you what those consequences would be? That’s in my novel. What about diseases jumping in time to a naive population? They could wreak havok. In my novel. S. M. Stirling brought up fundamental changes in the way people thought. I had something similar, with Gale talking about the myriad of details that make up a culture. Get Target Seventeen Must Die, because it’s loaded with awesome.