The House of Hades (Heroes of Olympus Book 4)

eyes stung. He staggered back, half-blind and dizzy, dimly aware of Nico screaming his name.
    ‘Frank!
Frank!
’
    He tried to focus. He was back in human form, retching and stumbling. His face felt like it was peeling off. In front of him, the green cloud of gas floated between him and the herd. The remaining cow monsters eyed him warily, probably wondering if Frank had any more tricks up his sleeve.
    He glanced behind him. Under the stone arch, Nico di Angelo was holding his black Stygian iron sword, gesturing at Frank to hurry. At Nico’s feet, two puddles of darkness stained the ground – no doubt the remains of the cow monsters that had chased them.
    And Hazel … she was propped against the wall behind her brother. She wasn’t moving.
    Frank ran towards them, forgetting about the monster herd. He rushed past Nico and grabbed Hazel’s shoulders. Her head slumped against her chest.
    ‘She got a blast of green gas right in the face,’ Nico said miserably. ‘I – I wasn’t fast enough.’
    Frank couldn’t tell if she was breathing. Rage and despair battled inside him. He’d always been scared of Nico. Now hewanted to drop-kick the son of Hades into the nearest canal. Maybe that wasn’t fair, but Frank didn’t care. Neither did the war gods screaming in his head.
    ‘We need to get her back to the ship,’ Frank said.
    The cow monster herd prowled cautiously just beyond the archway. They bellowed their foghorn cries. From nearby streets, more monsters answered. Reinforcements would soon have the demigods surrounded.
    ‘We’ll never make it on foot,’ Nico said. ‘Frank, turn into a giant eagle. Don’t worry about me. Get her back to the
Argo II
!’
    With his face burning and the voices screaming in his mind, Frank wasn’t sure he could change shape, but he was about to try when a voice behind them said, ‘Your friends can’t help you. They don’t know the cure.’
    Frank spun round. Standing on the threshold of the Black House was a young man in jeans and a denim shirt. He had curly black hair and a friendly smile, though Frank doubted he was friendly. Probably he wasn’t even human.
    At the moment, Frank didn’t care.
    ‘Can you cure her?’ he asked.
    ‘Of course,’ the man said. ‘But you’d better hurry inside. I think you’ve angered every
katobleps
in Venice.’

XIX
     

FRANK
     
    T HEY BARELY MADE IT INSIDE.
    As soon as their host threw the bolts, the cow monsters bellowed and slammed into the door, making it shudder on its hinges.
    ‘Oh, they can’t get in,’ the man in denim promised. ‘You’re safe now!’
    ‘Safe?’ Frank demanded. ‘Hazel is dying!’
    Their host frowned as if he didn’t appreciate Frank ruining his good mood. ‘Yes, yes. Bring her this way.’
    Frank carried Hazel as they followed the man further into the building. Nico offered to help, but Frank didn’t need it. Hazel weighed nothing, and Frank’s body hummed with adrenalin. He could feel Hazel shivering, so at least he knew she was alive, but her skin was cold. Her lips had taken on a greenish tinge – or was that just Frank’s blurry vision?
    His eyes still burned from the monster’s breath. His lungs felt like he’d inhaled a flaming cabbage. He didn’t know whythe gas had affected him less than it had Hazel. Maybe she’d got more of it in her lungs. He would have given anything to change places if it meant saving her.
    The voices of Mars and Ares yelled in his head, urging him to kill Nico and the man in denim and anyone else he could find, but Frank forced down the noise.
    The house’s front room was some sort of greenhouse. The walls were lined with tables of plant trays under fluorescent lights. The air smelled of fertilizer solution. Maybe Venetians did their gardening inside, since they were surrounded by water instead of soil? Frank wasn’t sure, but he didn’t spend much time worrying about it.
    The back room looked like a combination garage, college dorm and computer lab. Against the left wall glowed a bank of servers and laptops, their screen savers flashing pictures of ploughed fields and tractors. Against the right wall was a single bed, a messy desk and an open wardrobe filled with extra denim clothes and a stack of farm implements, like pitchforks and rakes.
    The back wall was a huge garage door. Parked next to it was a red-and-gold chariot with an open carriage and a single axle, like the chariots Frank had raced at Camp Jupiter. Sprouting from the sides of the