Free House of Sky and Breath (Crescent City) by Sarah J. Maas

admired Hypaxia Enador—she was alarmingly beautiful, brave, and intelligent—but until the High Priestess bound their hands at Luna’s Temple, until that titanium ring went on his finger … he’d savor these last months of freedom.
    He hoped it would be months, anyway. Hypaxia had not given his father any indication of a timeline.
    The faun stilled, chest heaving, and Ruhn let his thoughts of his betrothed fade away as he swallowed the taste of the faun deep into his throat.
    “Merciful Cthona,” the faun breathed, rising on her knees to pull herself off his face. Ruhn released the firm cheeks of her ass, meeting her bright gaze as she peered at him, a flush across her high cheekbones.
    Ruhn winked up at her, running a tongue over the corner of his mouth to get one final taste of her. Gods, she was delectable. Her throat bobbed, her pulse fluttering like a beckoning drum.
    Ruhn ran his hands up her bare thighs, fingers grazing over her narrow hips and waist. “Do you want to—”
    The door to his bedroom burst open, and Ruhn, pinned beneath the female, could do nothing but twist his head toward the male standing there.
    Apparently, the sight of the Crown Prince of the Valbaran Fae with a female straddling his face was common enough that Tristan Flynn didn’t so much as blink. Didn’t even smirk, though the faun leapt off Ruhn with a squeak, hiding herself behind the bed.
    “Get downstairs,” Flynn said, his usually golden-brown skin pale. Gone was any hint of drunken revelry. Even his brown eyes were sharp.
    “Why?” Ruhn asked, wishing he had time to talk to the female quickly gathering her clothes on the other side of the bed before he headed for the door.
    But Flynn pointed to the far corner—the pile of dirty laundry, and the Starsword propped against the stained wall beside it. “Bring that.”
    Ruhn’s raging hard-on had vanished, thankfully, by the time he made it to the top of the stairs above the foyer. Music still shook the floors of the house, people still drank and hooked up and smoked and did whatever bullshit they usually enjoyed during these parties.
    No sign of danger, no sign of anything except—
    There. A prickle at the back of his neck. Like a chill wind had skittered over the top of his spine.
    “Dec’s new security system picked up some kind of anomaly,” Flynn said, scanning the party below. He’d gone into pure Aux mode. “It’s making all the sensors go off. Some kind of aura—Dec said it felt like a storm was circling the house.”
    “Great,” Ruhn said, the hilt of the Starsword cool against his back. “And it’s not some drunk asshole dicking around with magic?”
    Flynn assessed the crowds. “Dec didn’t think so. He said from the way it circled the house, it seemed like it was surveilling the area.”
    Their friend and roommate had spent months designing a system to be placed around their house and the surrounding streets—one that could pick up things like the kristallos demon, formerly too fast for their technology to detect.
    “Then let’s see how it likes being watched, too,” Ruhn said, wishing he was slightly less high and drunk as his shadows wobbled around him. Flynn sniggered.
    The mirthroot took hold for a moment, and even Ruhn laughed as he moved for the staircase. But his amusement faded as he checked the rooms on either side of the foyer. Where the fuck was Bryce? He’d last seen her with Fury, Juniper, and Athalar in the living room, but from this angle atop the stairs, he couldn’t see her—
    Ruhn had made it three steps down the front staircase, dodging discarded beer cans and plastic cups and someone’s zebra-print bra, when the open front doors darkened.
    Or rather, the space within them darkened. Exactly as it had when those demons had stormed through the Gates.
    Ruhn gaped for a moment at the portal to Hel that had just replaced his front doors.
    Then he reached for the sword half-buckled at his back, working past his brain fog to gather