regor and Boots had just landed on Ares's back when a shock wave knocked the bat off his feet. Ares managed to get into the air, as did Nike, who carried Howard, and Aurora, who had Luxa. But Thalia was not so lucky. The little bat, with Hazard on her back, was thrown sideways.

"Hazard!" cried Luxa. She swooped down on Aurora with her arms extended to pull him up beside her, but he brushed her away.

"No, Luxa, I must stay with Thalia!" said Hazard. "We mean to be bonds!"

"She cannot take flight with you on her back!" said Howard. "Oh, we have no time for this! Nike!" Nike dove for Thalia, and Howard plucked the boy off her back with one hand.

"Thalia!" shrieked Hazard as Howard hauled him onto Nike's back. "Thalia!" Despite desperate flutterings of her wings, Thalia could not get into the air.

The entire world seemed to be shaking now, and a deep rumbling sound threatened to drown out their voices.

"Hold tight!" ordered Ares, and Gregor locked his legs around the bat and his arms around Boots as they tipped downward. Then they were level again, but Gregor could feel the drag on Ares and knew he had Thalia in his claws. "Which way?" the bat cried. "Back to the colony?"

"No, we will never make it. Follow me!" said Howard, and headed up the tunnel that led to the far side of the Swag.

Rock chips began to rain down from the roof of the tunnel. First small ones, like the gravel that lined the floor, but soon larger pieces. One caught Gregor on the shoulder, and the sharp edge cut through his shirt to his flesh. He pressed Boots forward over Ares's neck, protecting her with his body as best he could. Suddenly an awful thought hit him. "Temp! We left Temp behind!" He had not seen the cockroach on anyone's bat. A reassuring bump came from behind Gregor, and he knew the bug must have scurried up on Ares when the earthquake started. A good thing, too, because there was no going back for a rescue.

With his head bent over Ares's neck, Gregor could see the floor, rolling as if the gravel were waves on the ocean.

Cracks began to appear in the walls of the tunnel. First thin lines, which shot up the stone faces, etching treelike patterns in the surfaces. And then deeper fissures. That's when Gregor felt the water on the back of his neck. It was only a gentle patter like rain, but he knew that wouldn't last.

"The roof! It's breaking! The river's coming in!" he cried. He didn't know if Ares could hear him over the noise. Anyway, he was already flying as well as he could. The falling rocks had increased in both size and quantity, and despite the bat's best efforts, he could not dodge them all.

Suddenly the waves of gravel were replaced by rushing water and Gregor knew that somewhere behind him the river had broken through. The mouth of the tunnel was in sight. Nike and Aurora had just shot out into freedom when the wave hit Ares.

Boots was ripped from Gregor's arms. Ares disappeared from under him. Gregor was alone in the water, dragged along, unable even to seek air, because he had no idea where the air might be. "Boots!" his brain screamed. "Boots!"

Gregor was dashed against some rocks and allowed one ragged breath before another swell of water engulfed him. He tumbled over and over in the black water. His head struck something and he gasped, filling his lungs with water. He felt consciousness slipping away.

Then he was vaguely aware of a sharp pain in his foot and there was air around him again. He was dangling in space, water running from his nose and mouth. A bat had him from above, but he was unable to see which one.

The claw released him on a stone outcropping where he choked out the rest of the river he'd inhaled. The earth trembled ever so slightly beneath him. Gregor forced himself onto his knees. His flashlight was still working. Howard, Luxa, and Aurora lay bloody and gasping beside him. The wave must have caught them as well. There was no sign of the others.

"Boots!" Gregor cried out. His flashlight beam cut into the darkness. They were up very high over an expanse of churning water. Several hundred yards away, he could just see the top of what must have been the opening to the Swag. Ares and Nike were speeding over the water, searching for the others.

"Hazard! Hazard!" Luxa's voice was as desperate as his own.

Boots, Hazard, Thalia, Temp. The smallest, the youngest, the most vulnerable, were all missing.

"Aurora, can you fly? Can you fly?" begged Luxa. But the golden bat was still gagging up water and unable to answer.

The flashlight beam caught something floundering in a shallow area nearby. Ares dove and when he came up he had a sodden Thalia in his claws. And in her claws was Hazard.

Ares gently laid the pair on the stone before he fluttered off again. Thalia was waterlogged, probably going into shock, but she was at least still fighting. Hazard appeared lifeless. His pale skin had a bluish tint. Blood ran from a deep gash in his forehead. There was no movement in his chest.

Howard was over the boy at once, trying to restore his breathing. It took both Gregor and Aurora, who had recovered slightly, to hold Luxa back from Hazard.

"Let Howard do it! He's an expert!" Gregor said as she struggled. If Mareth were here, he'd have just knocked Luxa out. He'd done that to Howard when he'd flipped out the time his bat, Pandora, had been devoured by mites. But Gregor couldn't imagine hitting Luxa that hard.

When she'd calmed down enough that Aurora could contain her, Gregor waved his arms and called to Ares to retrieve him. They flew low over the water, searching frantically for a sign of life.

"Boots!" yelled Gregor. "Boots!" Every second that passed drained another bit of hope from his heart.

He could feel despair overtaking him when a tiny wail caught his ear. "Ma-maa!" It increased in volume. "Ma-maa!"

"Oh, man, she's alive!" said Gregor as tears of relief blurred his vision. "Boots! I'm coming! Hang on!"

"Ma-maa!" came back at him, but they still couldn't find her.

"Where is she, Ares?" said Gregor.

"I do not know! I cannot locate her!" said his bat.

"Ma-maa!" The cry was fainter this time.

Gregor felt the darkness was about to swallow her up forever. "Boots! Where are you?" As if she could tell him. But it turned out she could. For suddenly a pinprick of light caught his eye. Her scepter! Her stupid, silly, wonderful, amazing, and apparently waterproof princess scepter!

They found her in a small pool. Weeping. Her tiara and princess skirt gone. Clutching her scepter. Sitting on Temp's back as he paddled around in a circle, unable to climb up the steep rocks that surrounded them.

"Oh, sweetie," said Gregor as he pulled her up into his arms. "Oh, Boots."

She clung to him but was mad at him, too. "You let go. In the water. You let go of me!" she sobbed, and hit him with her small fist.

"I'm sorry. I tried not to. I'm sorry, Boots," he said, but she was not ready to forgive him.

There was no easy way to retrieve Temp. Ares ended up tossing the cockroach into the air with his snout and catching him on his back. Temp landed with a hollow thud that couldn't have felt too good, but the bug wasn't one to complain.

Boots, on the other hand, was just warming up. "You let Temp go! You let Temp go, too!"

"I'm sorry. I'm sorry," was all Gregor could say as they coasted in to join the others. Howard was still trying to restore Hazard's breathing when the earth began to shake again.

"An aftershock," thought Gregor. "I think that's what they're called." As he locked his arms around Boots he wondered if they should be trying to escape. But where do you run to when the whole world is unstable?

The sharp collision of rock on rock drew Gregor's attention back to the exit of the Swag. The stone wall above the tunnel, already cracked and damaged from the initial earthquake, began to break away. A deafening explosion of sound assaulted his ears, and then he was lying on his side, Boots still in his arms.

He lifted the flashlight just in time to see the avalanche bury the opening to the Swag under a mountain of rock.