He kept watching.

The moonlight was so bright in that place. Odd could see what he needed to. After some time, he pulled out the lump of wood he had found in his father’s hut and his knife, and he began to carve, in smooth, confident strokes, removing everything that wasn’t part of the carving.

He carved until daybreak, when the bear crunched through the trees into the clearing.

It did not ask what Odd had seen in the pool, and Odd did not volunteer anything.

Odd climbed onto the bear’s back. “You’re getting smaller again,” said Odd. This was no longer the huge bear of the previous evening. Now it seemed only slightly bigger than it had been the first time Odd had ridden it. “You’ve shrunk.”

“If you say so,” said the bear.

“Where do the Frost Giants come from?” asked Odd, as they bounded through the forest.

“Jotunheim,” said the bear. “It means giants’ home. It’s across the great river. Mostly they stay on their own side. But they’ve crossed before. One time, one of them wanted the Sun, the Moon and Lady Freya. The time before that, they wanted my hammer, Mjollnir, and the hand of Lady Freya. There was one time they wanted all the treasures of Asgard and Lady Freya…”

“They must like Lady Freya a lot,” said Odd.

“They do. She’s very pretty.”

“What’s it like in Jotunheim?” asked Odd.

“Bleak. Treeless. Cold. Desolate. Nothing like it is here. You should ask Loki.”

“Why?”

“He wasn’t always one of the Aesir. He was born a Frost Giant. He was the smallest Frost Giant ever. They used to laugh at him. So he left. Saved Odin’s life, on his travels. And he…” The bear hesitated and seemed to think twice about whatever he had been going to say, then finished, “…he keeps things interesting.” And then the bear said, “Anything that you did last night, anything you saw…”

“Yes?”

“The wise man knows when to keep silent. Only the fool tells all he knows.”

The fox and the eagle were waiting beside the remains of the fire. Odd finished what was left of the fish. Then the bear said, “Well? What do we do now?”

Odd said, “Take me to the edge of the forest. You wait for me. I’ll walk alone from there to the gates of Asgard.”

“Why?” asked the fox.

“Because I don’t want the Frost Giants knowing you three are back,” said Odd. “Not yet.”

They set off.

“I could get very used to travelling by bear,” Odd said. But the bear only grunted.

WHERE THE FOREST ENDED, the bear stopped, and Odd climbed off. He put his crutch beneath his armpit, gripped it hard with his right hand.

“Right,” he said. “Wish me good luck. The blessing of the Gods must count for something.”

“What if you don’t come back?” said the fox.

“Then you’re no worse off now than you were before you met me,” said Odd cheerfully. “Anyway, why shouldn’t I come back?”

“They could eat you,” said the bear.

Odd blinked. “Ah…do Frost Giants eat people?”

There was a pause. The fox said, “Occasionally” at the same time as the bear said, “Almost never.”

The fox coughed. “I wouldn’t worry,” it said. “There’s barely any meat on you. You’d scarcely be worth the trouble of eating.” It grinned. This did nothing to make Odd feel any better. He hefted his crutch and began to walk, slowly, laboriously, towards the huge stone wall that surrounded the city of the Gods.

The snow had blown clear of the path, and although the ground was slippery in places, he found the walk was not as hard as he had expected.

Days were longer here in Asgard. The sun was a silver coin that hung in the white sky. Odd pushed himself to keep walking, one step at a time, remembering back when he had walked with ease and never thought twice about the miracle of putting one foot in front of the other and pushing the world towards you.

At first, Odd thought that the wall of Asgard was as high as a tall man and that there was a pale statue of a man sitting on a boulder beside it—at least, he imagined it to be a statue. And then he moved slowly closer, and closer, and the wall grew, and the pale statue grew also, until, as the boy got closer still, he had to throw back his head to look at them.

Every step he took towards the gates, towards the huge pale figure on the boulder, he felt the temperature drop.

And then the statue moved, and Odd knew.

“WHO ARE YOU?” The voice tumbled across the plain like an avalanche.

“I’m called Odd,” shouted Odd, and he smiled.

The Frost Giant peered down at him. There were icicles in its eyebrows, and its eyes were the color of lake ice just before it cracks and drops you into freezing water.

“WHAT ARE YOU? A GOD? A TROLL? SOME KIND OF WALKING CORPSE?”

“I’m a boy,” yelled Odd, and he smiled again.

“AND WHAT IN YMIR’S NAME ARE YOU DOING HERE?”

It is a strange sensation, talking to a being who could crush you like a man could crush a baby mouse. And, thought Odd, at least mice can run.

“I’m here to drive the Frost Giants from Asgard,” explained Odd. Then he smiled at the giant, a big, happy, irritating smile.

It was the smile that did it. If Odd had not smiled, the giant would simply have picked him up and crushed the life from him, or squashed him against the boulder, or bitten his head off and kept him to snack on later. But that smile, a smile that said that Odd knew more than he was saying…

“No, you won’t,” said the Frost Giant. “You can’t.”

“’Fraid so,” said Odd.

“I outwitted Loki,” said the Frost Giant portentously. “I bested Thor. I banished Odin. All of Asgard is pacified and under my rule. Even now, my brothers march from Jotunheim, as reinforcements.” He darted a look towards the horizon, to the north. “The Gods are my slaves. I am betrothed to the lovely Freya. And you honestly think you can go up against me?”

Odd just shrugged and continued to smile. It was his broadest, most irritating smile, and at home, it had always gotten him hit. Even the giant wanted to hurt him, to wipe that smile off his face. But nobody had smiled at the giant like that before, and it bothered him.

“I rule Asgard!” boomed the giant.

“Why?” asked Odd.

“WHY?”

“I can hear you fine without you shouting,” said Odd, when the reverberations had died away. And then he said, pitching his voice just a little quieter, so the giant had to lean in to listen, “Why do you want to rule Asgard? Why did you take it over?”

The frost giant raised himself from the huge boulder. Then he jerked a thumb behind him. “See that wall?” he said.

You couldn’t avoid seeing it. It filled the world. Every stone in the wall was bigger than the houses in Odd’s village.

“My brother built that wall. He made a deal with the Gods—to build them a wall inside six months, or he would take no payment. And on the last day, as he was just about to complete it…on the last hour of the last day, they cheated him.”

“How?”

“A mare, the most beautiful animal anyone had ever seen, ran across the plain and lured away the stallion who was hauling the stones for my brother. It used womanish wiles. The stallion broke its bonds, and the horses ran off into the woods together and were gone. And then, just when my poor brother had nerved himself up to complain about how he was being treated, Thor returned from his travels and killed him with his damnable hammer. That’s how every tale of the Gods and the Frost Giants ends—with Thor killing Giants. Well, not this time.”