The House of Hades (Heroes of Olympus Book 4)

dissatisfied. ‘She died too easily, considering how much torture she put you through. She deserved worse.’
    Annabeth couldn’t argue with that, but the hard edge in Percy’s voice made her unsettled. She’d never seen someoneget so angry or vengeful on her behalf. It almost made her glad Arachne had died quickly. ‘How did you move so fast?’
    Percy shrugged. ‘Gotta watch each other’s backs, right? Now, you were saying … downstream?’
    Annabeth nodded, still in a daze. The yellow dust dissipated on the rocky shore, turning to steam. At least now they knew that monsters could be killed in Tartarus … though she had no idea how long Arachne would remain dead. Annabeth didn’t plan on staying long enough to find out.
    ‘Yeah, downstream,’ she managed. ‘If the river comes from the upper levels of the Underworld, it should flow deeper into Tartarus –’
    ‘So it leads into more dangerous territory,’ Percy finished. ‘Which is probably where the Doors are. Lucky us.’

VIII
     

ANNABETH
     
    T HEY’D ONLY TRAVELLED a few hundred yards when Annabeth heard voices.
    Annabeth plodded along, half in a stupor, trying to form a plan. Since she was a daughter of Athena, plans were supposed to be her speciality, but it was hard to strategize with her stomach growling and her throat baking. The fiery water of the Phlegethon may have healed her and given her strength, but it hadn’t done anything for her hunger or thirst. The river wasn’t about making you feel good, Annabeth guessed. It just kept you going so you could experience more excruciating pain.
    Her head started to droop with exhaustion. Then she heard them – female voices having some sort of argument – and she was instantly alert.
    She whispered, ‘Percy, down!’
    She pulled him behind the nearest boulder, wedgingherself so close against the riverbank that her shoes almost touched the river’s fire. On the other side, on the narrow path between the river and the cliffs, voices snarled, getting louder as they approached from upstream.
    Annabeth tried to steady her breathing. The voices sounded vaguely human, but that meant nothing. She assumed anything in Tartarus was their enemy. She didn’t know how the monsters could have failed to spot them already. Besides, monsters could
smell
demigods – especially powerful ones like Percy, son of Poseidon. Annabeth doubted that hiding behind a boulder would do any good when the monsters caught their scent.
    Still, as the monsters got nearer, their voices didn’t change in tone. Their uneven footsteps –
scrap
,
clump
,
scrap
,
clump
– didn’t get any faster.
    ‘Soon?’ one of them asked in a raspy voice, as if she’d been gargling in the Phlegethon.
    ‘Oh my gods!’ said another voice. This one sounded much younger and much more human, like a teenaged mortal girl getting exasperated with her friends at the mall. For some reason, she sounded familiar to Annabeth. ‘You guys are
totally
annoying! I told you, it’s like three
days
from here.’
    Percy gripped Annabeth’s wrist. He looked at her with alarm, as if he recognized the mall girl’s voice too.
    There was a chorus of growling and grumbling. The creatures – maybe half a dozen, Annabeth guessed – had paused just on the other side of the boulder, but still they gave no indication that they’d caught the demigods’ scent.Annabeth wondered if demigods didn’t smell the same in Tartarus, or if the other scents here were so powerful they masked a demigod’s aura.
    ‘I wonder,’ said a third voice, gravelly and ancient like the first, ‘if perhaps you do not know the way, young one.’
    ‘Oh, shut your fang hole, Serephone,’ said the mall girl. ‘When’s the last time
you
escaped to the mortal world? I was there a couple of years ago. I know the way! Besides,
I
understand what we’re facing up there. You don’t have a clue!’
    ‘The Earth Mother did not make you boss!’ shrieked a fourth voice.
    More hissing, scuffling and feral moans – like giant alley cats fighting. At last the one called Serephone yelled, ‘Enough!’
    The scuffling died down.
    ‘We will follow for now,’ Serephone said. ‘But if you do
not
lead us well, if we find you have
lied
about the summons of Gaia –’
    ‘I don’t lie!’ snapped the mall girl. ‘Believe me, I’ve got good reason to get into this battle. I have some enemies to devour, and you’ll feast on the blood of heroes. Just leave one special morsel for me