City of Bones by Cassandra Clare

for a cell phone.
    “So that’s a Sensor? What does it do?” she asked.
    “It picks up frequencies, like a radio does, but these frequencies are demonic in origin.”
    “Demon shortwave?”
    “Something like that.” Jace held the Sensor out in front of him as he approached the house. It clicked faintly as they climbed the stairs, then stopped. Jace frowned. “It’s picking up trace activity, but that could just be left over from that night. I’m not getting anything strong enough for there to be demons present now.”
    Clary let out a breath she hadn’t realized she’d been holding. “Good.” She bent to retrieve her keys. When she straightened up, she saw the scratches on the front door. It must have been too dark for her to have seen them last time. They looked like claw marks, long and parallel, raked deeply into the wood.
    Jace touched her arm. “I’ll go in first,” he said. Clary wanted to tell him that she didn’t need to hide behind him, but the words wouldn’t come. She could taste the terror she’d felt when she’d first seen the Ravener. The taste was sharp and coppery on her tongue like old pennies.
    He pushed the door open with one hand, beckoning her after him with the hand that held the Sensor. Once inside the entryway, Clary blinked, adjusting her eyes to the dimness. The bulb overhead was still out, the skylight too filthy to let in any light, and shadows lay thick across the chipped floor. Madame Dorothea’s door was firmly shut. No light showed through the gap under it. Clary wondered uneasily if anything had happened to her.
    Jace raised his hand and ran it along the banister. It came away wet, streaked with something that looked blackish red in the dim light. “Blood.”
    “Maybe it’s mine.” Her voice sounded tinny. “From the other night.”
    “It’d be dry by now if it were,” Jace said. “Come on.”
    He headed up the stairs, Clary close behind him. The landing was dark, and she fumbled her keys three times before she managed to slide the right one into the lock. Jace leaned over her, watching impatiently. “Don’t breathe down my neck,” she hissed; her hand was shaking. Finally the tumblers caught, the lock clicking open.
    Jace pulled her back. “I’ll go in first.”
    She hesitated, then stepped aside to let him pass. Her palms were sticky, and not from the heat. In fact, it was cool inside the apartment, almost cold—chilly air seeped from the entryway, stinging her skin. She felt goose bumps rising as she followed Jace down the short hallway and into the living room.
    It was empty. Startlingly, entirely empty, the way it had been when they’d first moved in—the walls and floor bare, the furniture gone, even the curtains torn down from the windows. Only faint lighter squares of paint on the wall showed where her mother’s paintings had hung. As if in a dream, Clary turned and walked toward the kitchen, Jace pacing her, his light eyes narrowed.
    The kitchen was just as empty, even the refrigerator gone, the chairs, the table. The kitchen cabinets stood open, their bare shelves reminding her of a nursery rhyme. She cleared her throat. “What would demons,” she said, “want with our microwave?”
    Jace shook his head, mouth curling under at the corners. “I don’t know, but I’m not sensing any demonic presence right now. I’d say they’re long gone.”
    She glanced around one more time. Someone had cleaned up the spilled Tabasco sauce, she noticed distantly.
    “Are you satisfied?” Jace asked. “There’s nothing here.”
    She shook her head. “I want to see my room.”
    He looked as if he were about to say something, then thought better of it. “If that’s what it takes,” he said, sliding the seraph blade into his pocket.
    The light in the hallway was out, but Clary didn’t need much light to navigate inside her own house. With Jace just behind her, she found the door to her bedroom and reached for the knob. It was cold in her hand—so