"Can I help you?" he asked. "Are you lost?"

The boy shook his head slowly. There was something strange about him. Something that suddenly made Stanley feel uneasy. It might have been the effect of the darkness and the shadows… but the boy looked very pale, very thin, very… hungry.

"Are you all right?" Stanley asked again, stepping closer. "Can I —"

Snap!

The sound came from directly overhead, loud and menacing. The boy leaped back quickly, out of the way.

Stanley just had time to glance up and see a huge red shape, which might have been some sort of bat, falling through the branches of the trees, almost faster than his eyes could follow.

And then the red thing was on him. Stanley opened his mouth to scream, but before he could, the monster's hands — claws? — clamped over his mouth. There was a brief struggle, then Stanley was sliding onto the ground, unconscious, unseeing, unknowing.

Above him, the two creatures of the night moved in for the feed.

"Imagine a man his age wearing a Scout's uniform," Mr. Crepsley snorted as he turned our victim over.

"Were you ever in the Scouts?" I asked.

"They did not have them in my day," he replied.

He patted the man's meaty legs and grunted. "Plenty of blood in this one," he said.

I watched as Mr. Crepsley searched the leg for a vein, then cut it open — a small slice — using one of his fingernails. As soon as blood oozed out, he clamped his mouth around the cut and sucked. He didn't believe in wasting any of the "precious red mercury," as he sometimes called it.

I stood uncertainly by his side as he drank. This was the third time I'd taken part in an attack, but I still wasn't used to the sight of the vampire sucking blood from a helpless human being.

It had been almost two months since my "death," but I was having a tough time adjusting to the change. It was hard to believe my old way of life was finished, that I was a half-vampire and could never go back. I knew I had to eventually leave my human side behind. But it was easier said than done.

Mr. Crepsley lifted his head and licked his lips.

"A good vintage," he joked, shuffling back from the body. "Your turn," he said.

I took a step forward, then stopped and shook my head.

" I can't ," I said.

"Do not be stupid," he growled. "You have shied away twice already. It is time you drank."

"I can't!" I cried.

"You have drunk animal blood," he said.

"That's different. This is a human."

"So what?" Mr. Crepsley snapped. " We are not. You have to start treating humans the same as animals, Darren. Vampires cannot live on animal blood alone. If you do not start drinking human blood, you will grow weak. If you continue to avoid it, you will die."

"I know," I said miserably. "You've explained it to me. And I know we don't hurt those we drink from, not unless we drink too much. But…" I shrugged unhappily.

He sighed. "Very well. It is hard, especially when you are only a half-vampire and the hunger is not so great. I will let you abstain this time. But you must feed soon. For your own sake."

He returned to the cut and cleaned away the blood — which had been leaking out while we were talking — from around the man's leg. Then he worked up a mouthful of spit and slowly let it dribble over the cut. He rubbed it in with a finger, then sat back and watched.

The wound closed and healed. Within a minute there was nothing left besides a small scar that the man probably wouldn't notice when he awoke.

That's how vampires protect themselves. Unlike in the movies, they don't kill people when they drink, not unless they are starving or get carried away and go too far. They drink in small doses, a little here, a little there. Sometimes they attack people out in the open, as we had just done. Other times, they creep into bedrooms late at night or into hospital wards or police cells.

The people they drink from hardly ever know they've been fed on by a vampire. When this man woke, he would remember only a falling red shape. He wouldn't be able to explain why he'd passed out or what had happened to him while he was unconscious.

If he found the scar, he'd be more likely to think it was the mark of aliens than a vampire.

Hah. Aliens ! Not many people know that vampires started the UFO stories. It was the perfect cover. People all over the world were waking up to find strange scars on their bodies and were blaming it on imaginary aliens.

Mr. Crepsley had knocked the scoutmaster out with his breath. Vampires can breathe out a special kind of gas, which makes people faint. When Mr. Crepsley wanted to put someone to sleep, he breathed into a cupped fist, then held his hand over the person's nose and mouth. Seconds later they were down for the count, and wouldn't wake for at least twenty or thirty minutes.

Mr. Crepsley examined the scar and made sure it had healed correctly. He took good care of his victims. He seemed to be a nice guy, from what I'd seen of him — apart from the fact that he was a vampire!

"Come," he said, standing. "The night is young. We will go find a rabbit or a fox for you."

"You don't mind me not drinking from him?" I asked.

Mr. Crepsley shook his head. "You will drink eventually," he said. "When you are hungry enough."

" No ," I said silently behind him, as he turned to walk away. "I won't. Not from a human. I'll never drink from a human. Never !"

Iwoke up early in the afternoon, as usual. I'd gone to bed shortly before dawn, the same time as Mr. Crepsley. But while he had to stay asleep until night came again, I was free to rise and move around in the daylight world. It was one of the advantages of being only a half-vampire.

I made a late breakfast of butter on a bagel — even vampires have to eat normal food; blood alone won't keep us going — and plopped down in front of the hotel TV. Mr. Crepsley didn't like hotels. He usually slept out in the open, in an old barn or a ruined building or a large crypt, but I was having no part of that. I told him point blank after a week of sleeping in the cold that I'd had enough of it. He grumbled a bit, but finally gave in.

The last two months had passed pretty quickly, because I'd been so busy learning about being a vampire's assistant. Mr. Crepsley wasn't a good teacher and didn't like repeating himself, so I had to pay attention and learn fast.

I was really strong now. I could lift huge weights and crush marbles to pieces with my fingers. If I shook hands with a human I had to be careful not to break the bones in his fingers. I could do chin-ups all night long and throw a baseball farther than any grown-up. (I measured my throw one day, then checked in a book and discovered I'd set a new world record! I was excited at first, but then realized I couldn't tell anybody about it. Still, it was nice to know I was a world champion.)

My fingernails were really thick, and the only way I could cut them was with my teeth; clippers and scissors were no good on my new, tough nails. They were a pain: I kept ripping my clothes when I was putting them on or taking them off and digging holes in my pockets when I stuck my hands in.

We'd covered a lot of distance since that night in the cemetery. First we'd fled at top vampire speed, me on Mr. Crepsley's back, invisible to human eyes, gliding across the land like a couple of high-speed ghosts. That's called flitting. But flitting is tiring work, so after a couple of nights we began taking trains and buses.

I don't know where Mr. Crepsley got the money for our travel and hotels and food. He had no wallet that I could see and no bank cards, but every time he had to pay for something, out came the cash.