My teeth chattered, and my lips were numb with cold. However, as we traveled deeper into the cave, the air gradually warmed. A faint noise echoed through the lower caverns: a roaring, hissing sound, like steam escaping a cracked pipe. Water dripped from the ceiling in rivulets now, soaking my clothes, and some of the ice shards looked dangerously unstable.

The hissing grew louder, punctuated with great roaring coughs and the acrid smell of smoke. Now I saw that some of the icicles had indeed fallen, smashed to pieces on the ground and glittering like broken glass.

My abductors brought me into a large cavern littered with shattered shards of ice. Puddles saturated the floor, and water fell like rain from the ceiling. The creatures dropped me to the icy ground and scuttled off. I rubbed my numb, aching limbs and looked around, wondering where I was. The cave was mostly empty, save for a wooden box filled with black rocks—coal?—in one corner. More were stacked along the far wall, next to a wooden archway that led off into the darkness.

A piercing whistle, like a steam engine roaring into the station, erupted from the tunnel, and black smoke churned from the opening. I smelled ashes and brimstone, and then a deep voice echoed throughout the cavern. “HAVE YOU BROUGHT HER?”

The scuttling creatures scattered, and several icicles smashed to the floor with an almost musical chime. I ducked behind an ice column as heavy footsteps clanked down the tunnel. Through the smoke, I saw something huge and grossly distorted, something definitely not human, and shook in terror.

A massive black horse emerged from the writhing smoke, eyes glowing like hot coals, flared nostrils blowing steam. It was as big as the horses that pulled the Budweiser wagon, but there the resemblance ended. At first, I thought it was covered in iron plates; its hide was bulky with metal, rusted and black, and it moved awkwardly with the weight. Then I realized its body was made of iron. Pistons and gears jutted out from its ribs. Its mane and tail were steel cables, and a great fire burned in its belly, visible through the chinks in its hide. Its face was a terrifying mask as it turned to me, blasting flame from its nostrils.

I fell back, certain I was going to die.

“ARE YOU MEGHAN CHASE?” The horse’s voice shook the room. More icicles committed suicide, but they were the least of my worries. I cringed back as the iron monster loomed over me, tossing its head and snorting flame. “ANSWER ME, HUMAN. ARE YOU MEGHAN CHASE, DAUGHTER OF THE SUMMER KING?”

“Yes,” I whispered as the horse moved closer, iron hooves pounding the ice. “Who are you? What do you want with me?”

“I AM IRONHORSE,” the beast replied, “ONE OF KING MACHINA’S LIEUTENANTS. I HAVE BROUGHT YOU HERE BECAUSE MY LORD HAS REQUESTED IT. YOU WILL COME WITH ME TO SEE THE IRON KING.”

The booming voice was giving me a headache. I tried to focus through the pounding in my skull. “The Iron King?” I asked stupidly. “Who—?”

“KING MACHINA,” Ironhorse confirmed. “SOVEREIGN LORD OF THE IRON COURT, AND RULER OF THE IRON FEY.”

Iron fey?

A chill slid up my spine. I looked around, at the countless eyes of the gremlinlike monsters, to the massive bulk of Ironhorse, and felt dizzy at the implications. Iron fey? Could there be such a thing? In all the stories, poems, and plays, I’d never encountered anything like this. Where did they come from? And who was this Machina, ruler of the Iron Fey? More important…

“What does he want with me?”

“IT IS NOT MINE TO KNOW.” Ironhorse snorted, swishing its tail with a clanking sound. “I ONLY OBEY. HOWEVER, YOU WOULD BE WISE TO COME WITH US, IF YOU WISH TO SEE YOUR BROTHER AGAIN.”

“Ethan?” I jerked my head up, glaring at Ironhorse’s expressionless mask. “How do you know about him?” I demanded. “Is he all right? Where is he?”

“COME WITH ME, AND ALL YOUR QUESTIONS WILL BE ANSWERED. THE IRON COURT AND MY LORD MACHINA AWAIT.”

I stood as Ironhorse turned, clanking back toward the tunnel. Its pistons creaked and the gears complained loudly as it shuffled forward. It was old, I realized, watching a bolt come loose and fall to the ground. A relic of days gone by. I wondered if there were newer, sleeker models out there, and what they looked like. Faster, better, more superior iron fey. After a moment, I decided I didn’t want to find out.

Ironhorse stood at the mouth of the tunnel, stamping impatiently. Sparks flew from its hooves as it glowered at me. “COME,” it ordered, with a blast of steam from its nostrils. “FOLLOW THE TROD TO THE IRON COURT. IF YOU WILL NOT WALK, THE GREMLINS WILL CARRY YOU.” It tossed its head and reared, flames shooting out its muzzle. “OR PERHAPS I WILL RUN BEHIND YOU, BREATHING FIRE—”

An ice spear flew through the air, striking Ironhorse between the ribs, bursting into steam as the fire engulfed it. The horse screamed, a high-pitched whistle, and whirled, hooves sparking as they struck the ice. The gremlins skittered forward, gazing wildly about, searching for intruders.

“Hey, ugly!” called a familiar voice. “Nice place you got here! Here’s a thought, though. Next time, try a hideout a little more resistant to fire than an ice cave!”

“Puck!” I cried, and the red-haired elf waved at me, grinning from the far side of the cavern. Ironhorse screamed and charged, scattering gremlins like birds as he bore down on Puck. Puck didn’t move, and the great iron beast knocked him flat in the ice, trampling him with his steel hooves.

“Oh, that looked painful,” called another Puck, a little farther down. “We really need to talk about your anger-management issues.”

With a roar, Ironhorse charged the second Puck, moving farther away from me and the trod. The gremlins followed, laughing and hissing, but kept a fair distance from the raging beast and its hooves.

A cool hand clamped over my mouth, muffling my startled shriek. I turned to gaze into glittering silver eyes.

“Ash?”

“This way,” he said in a low voice, tugging on my hand, “while the idiot has them distracted.”

“No, wait,” I whispered, pulling back. “He knows about Ethan. I have to find my brother—”

Ash narrowed his eyes. “Hesitate now, and Goodfellow will die. Besides…” He reached out and took my hand again. “I’m not giving you a choice.”

Dazed, I followed the Winter prince along the wall of the cavern, too stunned to ask why he was helping me. Didn’t he want to kill me? Was this rescue just to get me alone to finish the job in peace? But that didn’t make any sense; he could have just killed me while Puck was distracted with Ironhorse.

“Hellooooooooo.” Puck’s voice echoed farther down the cavern. “Sorry, ugly, wrong me! Keep going, I’m sure you’ll get it right next time!”

Ironhorse looked up from stomping a fake Puck into the ground, crimson eyes blazing with hate. Seeing yet another Puck, it tensed iron muscles to charge, when one of the gremlins spotted us sneaking along the wall and gave a yelp of alarm.

Ironhorse whirled, eyes flaring as they settled on us. Ash muttered a curse. With a bellow and a blast of flame from its nostrils, it charged, bearing down on us like the steam engine it was named for. Ash drew his sword and flung a shower of ice shards at the monster. They shattered harmlessly on its armored hide, doing nothing but enraging it further. As the roaring, flaming bulk of metal descended, Ash shoved me out of the way and dove forward, the flailing hooves missing him by inches. Rolling to his feet behind the monster, he cut at its flank, but Ironhorse plunged its head down and kicked him in the ribs. There was a sickening crack, and Ash was hurled away, crumpling to the floor in a heap.

A screaming flock of ravens descended on Ironhorse before it could stomp Ash into the ground. They swirled around its head, pecking and clawing, and Ironhorse roared as it lashed out at the flock, blasting them to cindery bits. Ash staggered to his feet as Puck appeared beside us, grabbing my hand.

“Time to go,” he announced cheerfully. “Prince, either keep up or get left behind. We’re leaving.”

We ran through the caverns, slipping on ice and slush, the insane roars of Ironhorse and the hissing of the gremlins on our heels. I didn’t dare look back. The cavern shook, and icicles smashed to the ground all around us, spraying me with stinging shards, but we kept going.

A fuzzy gray shape bounded toward us, tail held high. “You found her,” Grimalkin said, stopping to glare at Puck. “Idiot. I told you not to fight the horse thing.”

“Can’t talk now, little busy at the moment!” Puck gasped as we tore past the feline, continuing down the tunnel. Grimalkin flattened his ears and joined us as the shrieks of the gremlins ricocheted off the walls. I could see the mouth of the cave, dripping with icicles, and put on a burst of speed.

Ironhorse bellowed, and an ice shard smashed down inches from my face.

“Collapse the cave!” Grimalkin shouted, bounding along beside us. “Bring the ceiling down on their heads! Do it!” He zipped away, through the cave entrance, and was gone.

We burst out of the cave moments later, gasping, stumbling in the snow. Looking back, I saw dozens of green eyes skittering forward, heard the pounding hooves of Ironhorse as he followed close behind.

“Keep going!” Ash cried, and whirled around. Closing his eyes, he brought a fist to his face and bowed his head. The gremlins swarmed toward him, and the red glow of Ironhorse appeared, flames streaming in the darkness.

Ash opened his eyes and flung out a hand.

A low rumble shook the ground, and the cave trembled. Huge clumps of icicles shivered, wobbling back and forth. As the gremlins reached the mouth of the cave, the entire ceiling collapsed with a roar and a sound like breaking glass. Gremlins shrieked as they were crushed under several tons of ice and rock, and the dismayed bellow of Ironhorse rose above the cacophony.

The noise died away, and silence fell. Ash, standing two feet from the solid wall of ice sealing the cave, collapsed into the snow.

Puck grabbed my arm as I rushed forward. “Whoa, whoa, princess,” he said as I tried yanking free. “What do you think you’re doing? In case you forgot, princeling there is the enemy. We don’t help the enemy.”

“He’s hurt.”

“All the more reason to leave now.”

“He just saved our lives!”

“Technically, he was saving his own life,” Puck replied, still not letting go. I shoved him, hard, and he finally released me. “Look, princess.” He sighed as I glared at him. “Do you think Ash will play nice now? The only reason he helped—the only reason he agreed to a truce—was so he could bring you to Mab. She wants you alive, to use as leverage against Oberon. That’s the only reason he came along. If he wasn’t hurt, he’d be trying to kill me now.”

I looked at Ash, lying motionless in the snow. Flakes speckled his body—soon they would hide him completely. “We can’t just leave him to die.”

“He’s a Winter prince, Meghan. He won’t freeze to death, trust me.”

I scowled at him. “You’re just as bad as they are.” He blinked, startled, and I turned away from him. “I’m going to see if he’s all right, at least. Either come along or get out of my way.”

Puck threw up his hands. “Fine, princess. I’ll help the son of Mab, eternal enemy of our court. Even though he’ll probably stick a sword in my back the second my guard is down.”

“I wouldn’t worry about that,” Ash muttered, rising slowly to his feet. One hand gripped his sword; the other arm was wrapped around his ribs. He shook the snow from his hair and raised his weapon. “We can continue now, if you like.”

Grinning, Puck pulled his dagger. “I’d be thrilled,” he muttered, taking a step forward. “This won’t take long at all.”

I threw myself between them.

“Stop it!” I hissed, glaring at both in turn. “Stop it right now! Put your weapons up, both of you! Ash, you’re in no condition to fight, and, Puck, shame on you, agreeing to duel him when he’s obviously hurt. Sit down and shut up.”

They blinked at me, astounded, but slowly lowered their weapons. A sneezing laugh rang out in the branches of a tree, and Grimalkin peered down, swishing his tail in mirth.

“A daughter of Oberon after all,” he called, baring his teeth in a feline grin. “Queen Titania would be proud.”

Puck shrugged and flopped down on a log, crossing his arms and legs. Ash continued to stand, watching me with an unreadable expression. Ignoring Puck, I walked up to him. His eyes narrowed, and he tensed, raising his sword, but I wasn’t afraid. For the first time since I came here, I wasn’t afraid at all.

“Prince Ash,” I murmured, drawing closer, “I propose we make a deal.”

Surprise flickered across his face.

“We need your help,” I continued, gazing straight into his eyes. “I don’t know what those things were, but they called themselves iron fey. They also mentioned someone called Machina, the Iron King. Do you know who that is?”

“The Iron King?” Ash shook his head. “There is no one by that name in the courts. If this King Machina exists, he is a danger to all of us. Both courts will want to know about him and these…iron fey.”

“I need to find him,” I said, forcing as much determination into my voice as I could. “He’s got my brother. I need you to help us escape the Unseelie territory and find the court of the Iron King.”

Ash raised an eyebrow. “And why would I do that?” he asked softly. Not mocking, but dead serious.

I swallowed. “You’re injured,” I pointed out, holding his gaze. “You won’t be able to take me by force, not with Puck so eager to stick a knife in your ribs.” I glanced back at Puck, sulking on the log, and lowered my voice. “Here’s my bargain. If you help me find my brother and get him safely home, then I’ll go with you to the Unseelie Court. Without a fight, from me or Puck.”