"What's that, then?" Dr. Slaski asked. "And this better be good. Family Feud comes on in five minutes."

Good God. Was I, I wondered, going to end up wheelchair bound and addicted to game shows when I was Dr. Slaski's age? Because Dr. Slaski - or Mr. Slater, as Paul wanted everyone to think of him - is also a mediator, one who'd gone to the ends of the earth looking to find answers about his unusual talent. Apparently, he'd found what he was looking for in the tombs of ancient Egypt.

Problem is, nobody believed him. Not about the existence of a race of people whose sole duty it was to guide the spirits of the dead to their ultimate destinations, and certainly not that he, Dr. Slaski, was one of them. The old man's many writings on the subject, most of them self-published, went ignored by the scientific and academic communities, and were now gathering dust in plastic bins beneath his grandson's bed.

Worse, Dr. Slaski's own family seem to be trying to sweep him under the bed, as well, Paul's father even having gone so far as to change his name to avoid being associated with the old man.

And what had Dr. Slaski gotten for all his efforts? A terminal illness and his grandson, Paul, for company. The illness, or so Dr. Slaski claimed, had been brought on by spending too much time in the "shadowland" - that way station between this world and the next. And Paul?

Well, he had brought Paul on all by himself.

I guess he had a reason to feel bitterly toward the human race. But why he felt that way toward Paul, I was only just learning.

I tried to start out slowly, so he'd be sure to understand.

"Paul says mediators - "

"Shifters." Dr. Slaski insisted people like him and Paul and me are more properly called shifters, for our (in my case, newly discovered) ability to shift between the dimensions of the living and the dead. "Shifters, girl, I told you before. Don't make me say it again."

"Shifters," I corrected myself. "Paul says that shifters have the ability to time travel."

"Indeed," Dr. Slaski said. "What of it?"

I gaped at him. I couldn't help it. If he'd hit me in the back of the head with a pinata stick, I could not have been more surprised. "You . . . you knew about this?"

"Of course I know about it," Dr. Slaski said acidly. "Who do you think wrote the paper that gave that fool grandson of mine the idea?"

This is what I got for not paying more attention during my mediator sessions with Paul.

"But why didn't you tell me?"

Dr. Slaski looked at me very sarcastically. "You didn't ask," he said.

I sat there like a lump staring at him. I couldn't believe it. All this time . . . all this time I'd had another skill I'd known nothing about. But what would I have ever needed the ability to time travel for, anyway? I guess there were a few bad hair days I wouldn't have minded going back and fixing, but other than that. . . .

Then, like a bolt of lightning, it hit me.

My dad. I could go back through time and save my dad.

No. No, it didn't work that way. It couldn't. Because if it could . . . if it could. . . .

Then everything would be different.

Everything.

Dr. Slaski coughed, hard. I shook myself and touched his shoulder.

"Dr. Slaski? Are you all right?"

"What do you think?" Dr. Slaski demanded, not very graciously. "I've got six months to live. Maybe less, if those damned doctors have their way and keep bleeding the life out of me. You think I'm all right?"

"I . . ." It was selfish of me, I knew, but I didn't have time to listen to his health problems. I needed to know more about this new power he - and possibly I - had.

"How?" I demanded eagerly. "How do you do it? Travel through time, I mean."

Dr. Slaski glanced at the TV. Fortunately the credits for The Price Is Right were still rolling. Family Feud hadn't started yet.

"It's easy," he said. "If my idiot grandson can figure it out, any moron can."

We didn't have much time. Family Feud was going to start at any second.

"How?" I asked him again. "How?"

"You need something," the doctor said with exaggerated patience, like he was talking to a five-year-old. "Something of the time you want to go to. To anchor you to it."

I thought of a time-travel movie I had seen. "Like a coin?" I asked.

"A coin would do it," Dr. Slaski said, though he looked skeptical. "Of course, you'd need to use a coin that had once been owned by a specific person who existed in the time you want to go to, and who'd once actually stood where you're standing. And you need to pick a spot you can get back to without shifting onto some innocent bystander."

"You mean - " I blinked. "You mean when you go back, all of you goes back? Not just - "

"Your soul?" Dr. Slaski snorted. "Lot of good that what do, wandering around in some other century without any body. No, when you go, you go. That's why you've got to be smart about it. You can't just go hopping through time and space all willy-nilly, you know. Not if you want to keep your guts from spilling out. You've got to go to a spot where you knew the person once stood, hold the object they once owned, and - "

"And?" I asked breathlessly.

"Close your eyes and shift." Dr. Slaski looked back at the television, bored by the whole conversation.

"And that's it?" It was easy. "You mean I can just pop back through time and visit anyone I want?"

"Of course not," Dr. Slaski said, his gaze glued to the TV screen. It was almost as an afterthought that he added, "He's got to be dead, of course. And someone you've mediated. I never determined why, but it must have something to do with that person's energy, or being. Must be the link . . ." Dr. Slaski trailed off, lost in research done decades before.

"You mean . . ." I blinked in confusion. "We can only go back through time if it's to help a ghost?"

"Give the girl a prize," Dr. Slaski drawled, turning his gaze back toward the television.

For once I didn't mind his sarcasm. Because ghosts? Ghosts I can deal with. Ghosts like . . .

. . . well, my dad, for instance.

And I had plenty of stuff that once belonged to Dad. I still had the shirt he'd been wearing the day he died. I had plucked it from the pile of things the hospital had given us and kept it under my pillow for months after he'd died . . . right up until the day I finally saw him again, when he appeared to me, and told me exactly why it was that I, but not Mom, could see him.

I thought my mom hadn't known about it - the shirt, I mean - but now I knew she must have. She surely would have found it when she was making my bed or playing tooth fairy.

But she had never said anything. To be fair, she couldn't say anything, because she kept Dad's ashes in his favorite beer stein for years before we finally got the guts to scatter them in the park where he'd died, the park he'd loved so much, just before her wedding to Andy.

A park, I realized, I'd have to go to if I wanted to go back through time to save him, because the apartment we'd lived in had been sold and I couldn't very well walk up to the new owners and be all "Can I stand in your living room for a minute? I just need to pop back through time to save my dad's life."

Of course, both the park and the apartment were all the way across the country. But I had some babysitting money saved up. Maybe even enough for a plane ticket. . . .

I could do it. I could totally keep my dad from dying.

"What else?" I asked Dr. Slaski, with a glance at the TV. A commercial, thank God. "When you have the . . . thing that belonged to the ghost, and you're standing in a spot where he once stood? What do you do then?"

Dr. Slaski looked annoyed. "You hold the object - that's your anchor - and nothing else. That's important, you know. You can't be touching anything else or you could end up taking it with you. Then you picture the person. And then you go. Easy as pie." Dr. Slaski nodded at the TV. "Turn it up. Feud'll be on in a minute."

I couldn't believe it was so easy. Just like that, I could go back through time and keep someone I loved from dying.

"Of course," Dr. Slaski said casually, "once you get there - to where you're going - you have to watch yourself. You don't want to be changing history . . . at least, not too much. You have to weigh the consequences of your actions very carefully."

I didn't say anything. What possible consequences could my saving my dad have? Except that my mom, instead of crying into her pillow every night for years after he died - right up until she met Andy, actually - would be happy? That I would be happy?

Then it hit me. Andy. If my dad had lived, my mother would never have met Andy. Or rather, she might have met him, but she would never have married him.

And then we would never have moved to California.

And I would never have met Jesse.

Suddenly, the full impact of what Dr. Slaski had said sunk in. "Oh," I said.

His gaze - despite the glaucoma that clouded his blue eyes, which otherwise were like a photocopy of Paul's - was sharp.

"I thought there'd be an oh in there somewhere," he said. "Not as easy as you thought, shifting through time, is it? And keep in mind the fact that the longer you stay in a time not your own, the longer your recovery time when you do get back to the present," Dr. Slaski added not very pleasantly.

"Recovery time? You mean like . . . it gives you a headache?" Which was what shifting gave me. Every time.

Dr. Slaski looked amused about something. His gaze wasn't on the television screen, so I knew it was something to do with what I'd just said.

"Little worse than a headache," he said dryly, and patted the mattress beneath him. "Unless you mean that as a euphemism for losing a host of brain cells. And that's the least of what could happen to you. Time shift too many times and you'll be a vegetable before you're old enough to buy beer, I can guarantee."

"Does Paul know that?" I asked. "I mean, about the . . . losing brain cells thing?"

"He should," Dr. Slaski said, "if he read my paper on it."

And yet he still wanted to try it.

"Why would Paul want to go back through time?" I asked. He could hardly be motivated by a desire to help anyone, as the only person Paul Slater had ever been interested in helping was . . . well, Paul Slater.

"How should I know?" Dr. Slaski looked bored. "I don't understand why you spend any time at all with that boy. I told you he was no good. Just like his father, that one is, ashamed of me. . . ."

I didn't pay attention to Dr. Slaski's diatribe against his grandson. I was too busy thinking.

What was it Paul had said the other night, in the Gutierrezes' backyard? That he wouldn't kill Jesse . . .

. . . but that he might do something to keep Jesse from having died in the first place.

That was when it finally dawned on me. Standing there in Dr. Slaski's bedroom, while he fumbled for the remote, found the volume button, and cried, "Damnit, we missed the first category!"

Paul was going back through time. To Jesse's time.

And not to kill him.

To save his life.

Chapter seven

"Father Dominic?" My voice seemed frantic, even to my own ears. "Father D, are you there?"

"Yes, Susannah." Father Dominic sounded frazzled. But then, that could be because he still hadn't figured out how to work his cell phone. "Yes, I'm here. I thought you had to hit the Send button to answer, but apparently - "

"Father Dominic, something terrible has happened." I didn't wait for him to respond, but just plunged ahead. "Paul's figured out a way to go back through time, and he's going to go back to the day Jesse died and save his life."

There was a long pause. Then Father Dominic said, "Susannah. Where are you?"

I looked around. I was standing in Paul's kitchen, using the wall-mounted phone I had found there. I'd asked Dr. Slaski's attendant after I'd left his patient, if I could use the phone. He'd told me to go right ahead.

"I'm at Paul's house," I said. "Father Dominic, did you hear me? Paul's figured out a way to keep Jesse from dying."

"Well," Father Dominic said, "That's wonderful news. But shouldn't you be in school? It's only just a little past one o'clock - "

"Father D!" I practically screamed. "You don't understand! If Paul keeps Jesse from dying, then Jesse and I will never meet!"