Can Galactic Empires Exist Without Faster-Than-Light Travel?

My newest science fiction novel, Lockstep, was recently serialized in Analog magazine. Reactions have been pretty favourable — except that I've managed to offend a small but vocal group of readers. They're outraged that I've written an SF story in which faster than light travel is impossible. » 3/31/14 4:00pm 3/31/14 4:00pm

The Scharnhorst Effect claims we've got the speed of light wrong

Faster than light travel might be possible – but only over very small distances. And only because the light speed that we think of as absolute is actually already being slowed down. Here's why you’re not getting the light speed you’re entitled to. » 3/26/13 7:20am 3/26/13 7:20am