"Poor Carter Kane." The serpent's voice was all around us now-jumping from artifact to artifact, each one bursting from the power of Chaos. "Your leadership is doomed. Everything you tried to build will crumble. You will lose the ones you love the most."

Carter's blue defensive line began to flicker. If I didn't help him quickly...

"Apophis!" I yelled. "Why wait to destroy me? Do it now, you overgrown rat snake!"

A hiss echoed through the room. Perhaps I should mention that one of my many talents is making people angry. Apparently it worked on snakes, too.

The floor settled. Carter released his shielding spell and almost collapsed. Khufu, bless his baboon wits, leaped to the golden cabinet, picked it up, and bounded off with it.

When Apophis spoke again, his voice hardened with anger. "Very well, Sadie Kane. It's time to die."

The two ram-headed sphinxes stirred, their mouths glowing with flames. Then they lunged straight at me.

Fortunately one of them slipped in a puddle of penguin water and skidded off to the left. The other would've ripped my throat out had it not been tackled by a timely camel.

Yes, an actual full-sized camel. If you find that confusing, just think how the criosphinx must have felt.

Where did the camel come from, you ask? I may have mentioned Walt's collection of amulets. Two of them summoned disgusting camels. I'd met them before, so I was less than excited when a ton of dromedary flesh flew across my line of sight, plowed into the sphinx, and collapsed on top of it. The sphinx growled in outrage as it tried to free itself. The camel grunted and farted.

"Hindenburg," I said. Only one camel could possibly fart that badly. "Walt, why in the world-?"

"Sorry!" he yelled. "Wrong amulet!"

The technique worked, at any rate. The camel wasn't much of a fighter, but it was quite heavy and clumsy. The criosphinx snarled and clawed at the floor, trying unsuccessfully to push the camel off; but Hindenburg just splayed his legs, made alarmed honking sounds, and let loose gas.

I moved to Walt's side and tried to get my bearings.

The room was quite literally in chaos. Tendrils of red lightning arced between exhibits. The floor was crumbling. The walls cracked. Artifacts were coming to life and attacking my friends.

Carter fended off the other criosphinx, stabbing it with his khopesh, but the monster parried his strikes with its horns and breathed fire.

Felix was surrounded by a tornado of canopic jars that pummeled him from every direction as he swatted them with his staff. An army of tiny shabti had surrounded Alyssa, who was chanting desperately, using her earth magic to keep the room in one piece. The statue of Anubis chased Khufu around the room, smashing things with its fists as our brave baboon cradled the golden cabinet.

All around us, the power of Chaos grew. I felt it in my ears like a coming storm. The presence of Apophis was shaking apart the entire museum.

How could I help all my friends at once, protect that gold cabinet, and keep the museum from collapsing on top of us?

"Sadie," Walt prompted. "What's the plan?"

The first criosphinx finally pushed Hindenburg off its back. It turned and blew fire at the camel, which let loose one final fart and shrank back into a harmless gold amulet. Then the criosphinx turned toward me. It did not look pleased.

"Walt," I said, "guard me."

"Sure." He eyed the criosphinx uncertainly. "While you do what?"

Good question, I thought.

"We have to protect that cabinet," I said. "It's some sort of clue. We have to restore Ma'at, or this building will implode and we'll all die."

"How do we restore Ma'at?"

Instead of answering, I concentrated. I lowered my vision into the Duat.

It's hard to describe what it's like to experience the world on many levels at once-it's a bit like looking through 3D gla.s.ses and seeing hazy colorful auras around things, except the auras don't always match the objects, and the images are constantly shifting. Magicians have to be careful when they look into the Duat. Best-case scenario, you'll get mildly nauseous. Worst-case scenario, your brain will explode.

In the Duat, the room was filled with the writhing coils of a giant red snake-the magic of Apophis slowly expanding and encircling my friends. I almost lost my concentration along with my dinner.

Isis, I called. A little help?

The G.o.ddess's strength surged through me. I stretched out my senses and saw my brother battling the criosphinx. Standing in Carter's place was the warrior G.o.d Horus, his sword blazing with light.

Swirling around Felix, the canopic jars were the hearts of evil spirits-shadowy figures that clawed and snapped at our young friend, though Felix had a surprisingly powerful aura in the Duat. His vivid purple glow seemed to keep the spirits at bay.

Alyssa was surrounded by a dust storm in the shape of a giant man. As she chanted, Geb the earth G.o.d lifted his arms and held up the ceiling. The shabti army surrounding her blazed like a wildfire.

Khufu looked no different in the Duat, but as he leaped around the room evading the Anubis statue, the golden cabinet he was carrying flapped open. Inside was pure darkness-as if it were full of octopus ink.

I wasn't sure what that meant, but then I looked at Walt and gasped.

In the Duat, he was shrouded in flickering gray linen-mummy cloth. His flesh was transparent. His bones were luminous, as if he were a living X-ray.

His curse, I thought. He's marked for death.

Even worse: the criosphinx facing him was the center of the Chaos storm. Tendrils of red lightning arced from its body. Its ram face changed into the head of Apophis, with yellow serpentine eyes and dripping fangs.

It lunged at Walt, but before it could strike, Walt threw an amulet. Golden chains exploded in the monster's face, wrapping around its snout. The criosphinx stumbled and thrashed like a dog in a muzzle.

"Sadie, it's all right." Walt's voice sounded deeper and more confident, as if he were older in the Duat. "Speak your spell. Hurry."

The criosphinx flexed its jaws. The gold chains groaned. The other criosphinx had backed Carter against a wall. Felix was on his knees, his purple aura failing in a swirl of dark spirits. Alyssa was losing her battle against the crumbling room as chunks of the ceiling fell around her. The Anubis statue grabbed Khufu's tail and held him upside down while the baboon howled and wrapped his arms around the gold cabinet.

Now or never: I had to restore order.

I channeled the power of Isis, drawing so deeply on my own magic reserves, I could feel my soul start to burn. I forced myself to focus, and I spoke the most powerful of all divine words: "Ma'at."

The hieroglyph burned in front of me-small and bright like a miniature sun: "Good!" Walt said. "Keep at it!" Somehow he'd managed to pull in the chains and grab the sphinx's snout. While the creature bore down on him with all its force, Walt's strange gray aura was spreading across the monster's body like an infection. The criosphinx hissed and writhed. I caught a whiff of decay like the air from a tomb-so strong that I almost lost my concentration.

"Sadie," Walt urged, "maintain the spell!"

I focused on the hieroglyph. I channeled all my energy into that symbol for order and creation. The word shone brighter. The coils of the serpent burned away like fog in sunlight. The two criosphinxes crumbled to dust. The canopic jars fell and shattered. The Anubis statue dropped Khufu on his head. The army of shabti froze around Alyssa, and her earth magic spread through the room, sealing cracks and shoring up walls.

I felt Apophis retreating deeper into the Duat, hissing in anger.

Then I promptly collapsed.

"I told you she could do it," said a kindly voice.

My mother's voice...but of course that was impossible. She was dead, which meant I spoke with her only occasionally, and only in the Underworld.

My vision returned, hazy and dim. Two women hovered over me. One was my mum-her blond hair clipped back, her deep blue eyes sparkling with pride. She was transparent, as ghosts tend to be; but her voice was warm and very much alive. "It isn't the end yet, Sadie. You must carry on."

Next to her stood Isis in her white silky gown, her wings of rainbow light flickering behind her. Her hair was glossy black, woven with strands of diamonds. Her face was as beautiful as my mum's, but more queenly, less warm.

Don't misunderstand. I knew from sharing Isis's thoughts that she cared for me in her own way, but G.o.ds are not human. They have trouble thinking of us as more than useful tools or cute pets. To G.o.ds, a human life span doesn't seem much longer than that of the average gerbil.

"I would not have believed it," Isis said. "The last magician to summon Ma'at was Hatshepsut herself, and even she could only do it while wearing a fake beard."

I had no idea what that meant. I decided I didn't want to know.

I tried to move but couldn't. I felt as if I were floating at the bottom of a bathtub, suspended in warm water, the two women's faces rippling at me from just above the surface.

"Sadie, listen carefully," my mother said. "Don't blame yourself for the deaths. When you make your plan, your father will object. You must convince him. Tell him it's the only way to save the souls of the dead. Tell him..." Her expression turned grim. "Tell him it's the only way he'll see me again. You must succeed, my sweet."

I wanted to ask what she meant, but I couldn't seem to speak.

Isis touched my forehead. Her fingers were as cold as snow. "We must not tax her any further. Farewell for now, Sadie. The time rapidly approaches when we must join together again. You are strong. Even stronger than your mother. Together we will rule the world."

"You mean, Together we will defeat Apophis," my mother corrected.

"Of course," Isis said. "That's what I meant."

Their faces blurred together. They spoke in a single voice: "I love you."

A blizzard swept across my eyes. My surroundings changed, and I was standing in a dark graveyard with Anubis. Not the musty old jackal-headed G.o.d as he appeared in Egyptian tomb art, but Anubis as I usually saw him-a teenaged boy with warm brown eyes, tousled black hair, and a face that was ridiculously, annoyingly gorgeous. I mean, please-being a G.o.d, he had an unfair advantage. He could look like anything he wanted. Why did he always have to appear in this form that twisted my insides to pretzels?

"Wonderful," I managed to say. "If you're here, I must be dead."

Anubis smiled. "Not dead, though you came close. That was a risky move."

A burning sensation started in my face and worked its way down my neck. I wasn't sure if it was embarra.s.sment, anger, or delight at seeing him.

"Where have you been?" I demanded. "Six months, not a word."

His smile melted. "They wouldn't let me see you."

"Who wouldn't let you?"

"There are rules," he said. "Even now they're watching; but you're close enough to death that I can manage a few moments. I need to tell you: you have the right idea. Look at what isn't there. It's the only way you might survive."

"Right," I grumbled. "Thanks for not speaking in riddles."

The warm sensation reached my heart. It began to beat, and suddenly I realized I'd been without a heartbeat since I'd pa.s.sed out. That probably wasn't good.

"Sadie, there's something else." Anubis's voice became watery. His image began to fade. "I need to tell you-"

"Tell me in person," I said. "None of this 'death vision' nonsense."

"I can't. They won't let me."

"You still sound like a little boy. You're a G.o.d, aren't you? You can b.l.o.o.d.y well do what you like."

Anger smoldered in his eyes. Then, to my surprise, he laughed. "I'd forgotten how irritating you are. I'll try to visit...briefly. We have something to discuss." He reached out and brushed the side of my face. "You're waking now. Good-bye, Sadie."

"Don't leave." I grasped his hand and held it against my cheek.

The warmth spread throughout my body. Anubis faded away.

My eyes flew open. "Don't leave!"

My burned hands were bandaged, and I was gripping a hairy baboon paw. Khufu looked down at me, rather confused. "Agh?"

Oh, fab. I was flirting with a monkey.

I sat up groggily. Carter and our friends gathered around me. The room hadn't collapsed, but the entire King Tut exhibit was in ruins. I had a feeling we would not be invited to join the Friends of the Dallas Museum anytime soon.

"Wh-what happened?" I stammered. "How long-?"

"You were dead for two minutes," Carter said, his voice shaky. "I mean, no heartbeat, Sadie. I thought...I was afraid..."

He choked up. Poor boy. He really would have been lost without me.

[Ouch, Carter! Don't pinch.]

"You summoned Ma'at," Alyssa said in amazement. "That's like...impossible."

I suppose it was rather impressive. Using divine words to create an object like an animal or a chair or a sword-that's hard enough. Summoning an element like fire or water is even trickier. But summoning a concept, like Order-that's just not done. At the moment, however, I was in too much pain to appreciate my own amazingness. I felt as if I'd just summoned an anvil and dropped it on my head.

"Lucky try," I said. "What about the golden cabinet?"

"Agh!" Khufu gestured proudly to the gilded box, which sat nearby, safe and sound.

"Good baboon," I said. "Extra Cheerios for you tonight."

Walt frowned. "But the Book of Overcoming Apophis was destroyed. How will a cabinet help us? You said it was some kind of clue...?"

I found it hard to look at Walt without feeling guilty. My heart had been torn between him and Anubis for months now, and it just wasn't fair of Anubis to pop into my dreams, looking all hot and immortal, when poor Walt was risking his life to protect me and getting weaker by the day. I remembered how he had looked in the Duat, in his ghostly gray mummy linen....

No. I couldn't think about that. I forced myself to concentrate on the golden cabinet.

Look at what isn't there, Anubis had said. b.l.o.o.d.y G.o.ds and their b.l.o.o.d.y riddles.

The face in the wall-Uncle Vinnie-had told me the box would give us a hint about how to defeat Apophis, if I was smart enough to understand it.

"I'm not sure what it means yet," I admitted. "If the Texans let us take it back to Brooklyn House..."

A horrible realization settled over me. There were no more sounds of explosions outside. Just eerie silence.

"The Texans!" I yelped. "What's happened to them?"