I followed Dad back down the trail. “Did you feel the earthquake?” he asked, once the waterfall was far enough away that he didn’t have to shout.
“Earthquake?” I remembered the ground shaking—was that what an earthquake felt like? Did the air usually go all blurry during a quake?
“Just a small one.” Dad grinned, like he couldn’t wait for the ground to rattle and shake some more. “Earthquakes, volcanoes—really, Iceland’s just one huge geologic event waiting to happen.”
Now there’s a comforting thought. I stepped past the drowning pool and onto the main gravel path.
Katrin ran up to us, her braid flying out behind her, and looked right at me. “You’re okay?” The anger was gone, and her face was pinched with worry.
“I’m fine.” Was there some reason I shouldn’t be? “It was just a small quake.” I smiled, but Katrin didn’t smile back.
She looked sharply at Dad. “Tomorrow, Gabe. Both of you.”
Dad sighed, as if he found the idea troubling. “Yes, Katrin. We’ll be there.”
Katrin nodded and walked away without another word. I looked at Dad.
“Lunch,” he said. “We’re meeting to talk about this summer’s observation stations, and Katrin invited you along.” Dad shoved his hood back and ran a hand through his unruly hair. Before I could ask why Katrin would want me to come to lunch when she thought I shouldn’t be here at all, he said, “Speaking of food, what do you say we get some dinner?” Dad blinked hard, like he did when he stayed up too late working on a paper.
I rubbed my eyes, too. A night without sleep was enough to make the world seem more than a little blurry, right? “Dinner sounds good.”
“We’ll get hot dogs,” Dad said. “Iceland has the best lamb hot dogs—”
“Yeah, Dad.” I laughed. “I came four thousand miles just to eat hot dogs.”
Dad laughed, too, and for a moment the tiredness left his face. It wasn’t only the flight—he’d looked more tired at home, too, since Mom had disappeared. I knew how he felt.
I had to find her. For both of us. I’d have dinner first, and try to get some sleep—and then I’d make Dad answer my questions. Or else I’d go look for Mom on my own. No way was I letting this go. I followed Dad back to the car. My hand itched, and I glanced down at it.
There was a small red circle on my palm, right over the red half-moons where I’d dug my nails in—right where the coin had burned me.
Chapter 2 
The red mark had long faded by the time we ate dinner and returned to our guesthouse in Reykjavik. It was nearly ten by then, not that you could tell by the sun, which was low but still up, shining like an old quarter through layers of gray. I scribbled a postcard to Jared, changed into an oversized T-shirt, and crawled into bed. I was so, so tired. I clutched Mortimer, the stuffed brown wombat no one but Mom knew I slept with, and let soft sleep wrap around me, hoping for once I’d sleep without dreams.
Yeah right. Just because I’d traveled thousands of miles and not slept for two days, what made me think the universe would give me a break?
I dreamed of a gray tower of toy blocks, stacked on a golden hillside. Dandelions had rooted in the blocks and gone to seed. Little white-and-black birds perched on their heights.
I dreamed of a bow made of fire. Someone drew the bowstring back, and a burning arrow arced through the air. The arrow struck the hillside; the ground shuddered and gaped open where it fell. More flames leaped up from beneath the earth. Birds screamed and fled. Blocks caught fire as they tumbled to the ground.
The flames leaped higher, turning into grasping arms that were made, like the bow, all of fire. I ran, and as I did I felt something catch beneath my skin. I knew then the fire was in me, not the earth, after all.
The acrid stench of smoke filled the air. “You must never run from sorcery,” a voice yelled, but I just ran faster, struggling to breathe through the smoke, while my skin melted away and my bones crumbled to ash—
I bolted upright in bed, sweat pouring down my face. Something burned in my hand—I opened my eyes and saw the small silver coin, engraved with its pattern of circles and lines. I flung the thing across the room. I’d left it in my jeans last night. I knew I had.
I sat there, gasping for breath, trying to shake off the nightmare. Sweat plastered my T-shirt to my skin. “Just a dream,” I whispered. Slowly, the fear that burned through me faded. I had nightmares all the time now. Usually they were about Mom: Mom being kidnapped, Mom falling into a ravine, Mom being stabbed or shot or simply getting lost and calling my name. By day I told myself Mom had to be all right, but at night I dreamed about every possible awful thing that could have happened to her.
Mom hadn’t been in this dream, but I still had that stomach-aching, hands-trembling, after-nightmare feeling. “Just a dream.” I kept whispering so I wouldn’t wake Dad. Dad never knew what to do when I had nightmares; he just looked lost. I needed Mom here, to stroke my hair and chase the dreams away.
At least it was morning. Sun shone around the drawn shades. Through the thin wall I heard Dad talking about pyroclastic flows in his sleep. I dug Mortimer out from beneath the covers and hugged him close. The old wombat’s eyes had fallen out long ago and had been replaced with mismatched buttons. The thread of his seams was a different color each place Mom had patched him up. Mom was always bringing me stuffed animals, every one a different species and none of them the standard bear. Still holding Mortimer, I leaned back and shut my eyes.
Flames danced behind my eyelids. I leaped to my feet, breathing hard. “Just a dream,” I said, over and over. “Just a stupid dream.” My hands shook, and I tasted ash at the back of my throat. No way was I closing my eyes again.
I dug through my suitcase instead, pulled out running pants and a tank top, and got dressed for a run. My track coach was impressed by how much I’d practiced this past year, picking up county honors as a sophomore. I didn’t tell him I didn’t run for the honors. I ran because running chased the nightmares away.
My hands trembled as I laced up my sneakers. I glanced at the clock—4:17, it read. I groaned. It wasn’t morning. It was just Iceland, where the sun barely set in summer and barely rose in winter. I wasn’t about to go back to sleep, though. I pulled my tangled hair into a ponytail, wrote a note for Dad and taped it to the fridge, and headed out. The clouds and the rain were gone, leaving behind a deep blue sky and low pale sun. The cool air smelled heavy with water. It felt good against my sweaty skin.
My trembling eased as I headed down the gray brick sidewalk at a brisk pace, warming cold muscles. Just a dream. Concrete buildings lined the street, painted red and blue and green, like toy houses. A woman pushed a stroller toward me. The baby inside slept quietly. The woman’s eyes were red, as if she hadn’t slept nearly as well. I smiled in sympathy, but she didn’t smile back.
I broke into a slow jog. The dream faded, the memory of flames turning less real than the slap of my rubber soles on the pavement and the music blaring from a distant bar. Bright blue water shone in the distance. I headed toward it. Somewhere a car horn honked—a quiet honk, oddly polite. Two small white birds with red beaks, black caps, and long tail feathers stared at me from a rooftop. Arctic terns? Somewhere farther away, a raven krawked, and the little birds flew off abruptly. I was less interested in birds than in mammals, but I remembered that arctic terns migrated all the way from the Arctic to Antarctica and back again, every single year. They were tough little birds.