Queen of Shadows (Throne of Glass #4) by Sarah J. Maas

Aelin loathed the sewers.

Not because they were filthy, reeking, and full of vermin. They were actually a convenient way to get around Rifthold unseen and undisturbed, if you knew the way.

She’d hated them ever since she’d been bound up and left to die, courtesy of a bodyguard who hadn’t taken so well to her plans to kill his master. The sewers had flooded, and after freeing herself from her bonds, she had swum—actually swum—through the festering water. But the exit had been sealed. Sam, by pure luck, had saved her, but not before she’d nearly drowned, swallowing half the sewer along the way.

It had taken her days and countless baths to feel clean. And endless vomiting.

So climbing into that sewer, then sealing the grate above her … For the first time that night, her hands shook. But she forced herself past the echo of fear and began creeping through the dim, moonlit tunnels.

Listening.

Heading southeast, she took a large, ancient tunnel, one of the main arteries of the system. It had probably been here from the moment Gavin Havilliard decided to establish his capital along the Avery. She paused every so often to listen, but there were no signs of her pursuers behind her.

An intersection of four different tunnels loomed ahead, and she slowed her steps, palming her fighting knives. The first two were clear; the third—the one that would take her right into the path of the captain if he was headed to the castle—darker, but wide. And the fourth … Southeast.

She didn’t need her Fae senses to know that the darkness leaking from the southeastern tunnel wasn’t of the usual sort. The moonlight from the grates above didn’t pierce it. No noise issued, not even the scampering of rats.

Another trick of Arobynn’s—or a gift? The faint sounds she’d been following had come from this direction. But any trail died here.

She paced with feline quiet in front of the line where the murky light faded into impenetrable blackness. Silently, she plucked up a bit of fallen stone and chucked it into the gloom ahead.

There was no answering sound when it should have landed.

“I wouldn’t do that if I were you.”

Aelin turned toward the cool female voice, casually angling her knives.

The hooded guard from the Vaults was leaning against the tunnel wall not twenty paces behind her.

Well, at least one of them was here. As for Chaol …

Aelin held up a knife as she stalked toward the guard, gobbling down every detail. “Sneaking up on strangers in the sewers is also something I’d advise against.”

When Aelin got within a few feet, the woman lifted her hands—delicate but scarred, her skin tan even in the pale glow from the streetlights in the avenue above. If she’d managed to sneak up this close, she had to be trained—in combat or stealth or both. Of course she was skilled, if Chaol had her watching his back at the Vaults. But where had he gone now?

“Disreputable pleasure halls and sewers,” Aelin said, keeping her knives out. “You certainly live the good life, don’t you?”

The young woman pushed off the wall, her curtain of inky hair swaying in the shadows of her hood. “Not all of us are blessed enough to be on the king’s payroll, Champion.”

She recognized her, then. The real question was whether she’d told Chaol—and where he now was. “Dare I ask why I shouldn’t throw stones down that tunnel?”

The guard pointed toward the tunnel closest behind her—bright, open air. “Come with me.”

Aelin chuckled. “You’ll have to do better than that.”

The slender woman stepped nearer, the moonlight illuminating her hooded face. Pretty, if grave, and perhaps two or three years older.

The stranger said a bit flatly, “You’ve got twenty guards on your ass, and they’re cunning enough to start looking down here very soon. I’d suggest you come along.”

Aelin was half tempted to suggest she go to hell, but smiled instead. “How’d you find me?” She didn’t care; she just needed to feel her out a bit more.

“Luck. I’m on scouting duty, and popped onto the street to discover that you’d made new friends. Usually, we have a strike-first, ask-questions-later policy about people wandering the sewers.”

“And who is this ‘we’?” Aelin said sweetly.

The woman just began walking down the bright tunnel, completely unconcerned with the knives Aelin still held. Arrogant and stupid, then. “You can come with me, Champion, and learn some things you probably want to know, or you can stay here and wait to see what answers that rock you threw.”

Aelin weighed the words—and what she’d heard and seen so far that night. Despite the shiver down her spine, she fell into step beside the guard, sheathing her knives at her thighs.

With each block they trudged through the sewer muck, Aelin used the quiet to gather her strength.

The woman strode swiftly but smoothly down another tunnel, and then another. Aelin marked each turn, each unique feature, each grate, forming a mental map as they moved.

“How did you recognize me?” Aelin said at last.

“I’ve seen you around the city—months ago. The red hair was why I didn’t immediately identify you at the Vaults.”

Aelin watched her from the corner of her eye. The stranger might not know who Chaol really was. He could have used a different name, despite what the woman claimed to know about whatever it was she thought Aelin was seeking.