The dark shapes glided forward, not hurrying, now that they had their prey cornered. They could take on any shape, because they had no texture or substance, but they had a taste for the shapes that terrified. Their faces were blank, heads without eyes that could still see you, like childhood nightmares. Their more abstract shapes were designed to disturb and unsettle. Just looking at them for too long could make you feel sick, right down to your soul. They oozed forward, savouring our helplessness.

"What are they made of?" Tommy asked, as much for the comfort of the sound of his own voice as anything.

"They're living shadows," I said. "Anti-life. No-one knows exactly what they are, or how Walker bound them to his will, to serve the Authorities. Most likely rumour is that they came through a Timeslip from a far future, where the sun has gone out and an endless night has fallen over all the Earth. And the Shadow Men are all that live in that terrible dark."

"I wish I hadn't asked," said Tommy. "So? How do we fight them?"

"Actually, I was hoping you'd have some ideas," I said, glancing quickly around me. "I don't know anyone who's ever beaten a Shadow Man."

"Well try something, dammit!"

I looked at all the gaudy neon signs surrounding us, and muttered a few Words of Power under my breath. Immediately every sign flared up simultaneously, the bright letters and shapes blazing fiercely against the night. The signs sparked and buzzed loudly, the sheer force of the light driving back the dark like a Technicolor dawn, but it didn't even slow the advance of the Shadow Men. One by one the

signs overloaded, exploding or sputtering out in showers of sparks, shutting down all the length of the street. And the night that returned was even darker than before.

I reached into my coat pocket and pulled out three salamander eggs I'd been saving for a rainy day. I threw them at the nearest Shadow Men, and they exploded like incendiaries, blazing up with incandescent light and heat. The Shadow Men rolled right over them, swallowing them up in a second.

I breathed deeply, trying to steady myself, and looked at Tommy.

"I have an idea," he said, reluctantly. By now he was standing so close to me he was practically pushing me over. "But I have to say, it is rather ... risky."

"Do it," I said. "I'm not going into those Shadows alive."

Tommy frowned, concentrating, and I could feel his gift activating, as though suddenly there was a third person standing there with us. The Shadow Men were all around us now, almost close enough to touch us. I could feel my heart hammering in my chest, and I could hardly get my breath. Tommy spoke slowly, thoughtfully, as though saying the words aloud made them certain, incontrovertible.

"I deal in probabilities. In the nature of shifting reality. I persuade the world to see things my way. And since there is a small but very real chance that we could have got to Time Tower Square before the Shadow Men could find us ... I believe that is what really happened."