“And God the taste of undercover on my tongue again, the brush of it down the little hairs on my arms. I'd thought I remembered what it was like, every detail, but I'd been wrong: memories are nothing, soft as gauze against the ruthless razor-fineness of that edge, beautiful and lethal, one tiny slip and it'll slice to the bone.”

“And some go the other way, the most lethal way of all: when the pressure gets to be too much, it's not their nerve that breaks, it's their fear. They lose the capacity to be afraid, even when they should be. These can't ever go home again. They're like those First World War airmen, the finest ones, shining in their recklessness and invincible, who got home and found that home had no place for what they were. Some people are undercovers all the way to the bone; the job has taken them whole.”

“Over time, the ghosts of things that happened start to turn distant; once they've cut you a couple of million times, their edges blunt on your scar tissue, they wear thin. The ones that slice like razors forever are the ghosts of things that never got the chance to happen.”

“Somewhere at the back of my head I heard a click, tiny and irrevocable. Memory magnifies it to a wrenching, echoing crack, but the truth is that it was the very smallness that made it so terrible.”

“Out of absolutely nowhere I felt a sudden, sweet shot of joy, piercing and distilled as the jolt I imagine heroin users get when the fix hits the vein. It was my partner bracing herself on her hands as she slid fluidly off the desk, it was the neat practiced movement of flipping my notebook shut one-handed, it was my superintendent wriggling into his suit jacket and covertly checking his shoulders for dandruff, it was the garishly lit office with a stack of marker-labeled case files sagging in the corner and evening rubbing up against the window. It was the realization, all over again, that this was real and it was my life. Maybe Katy Devlin, if she had made it that far, would have felt this way about blisters on her toes, the pungent smell of sweat and floor wax in the dance studios, the early-morning breakfast bells raced down echoing corridors. Maybe she, like me, would have loved the tiny details and the inconveniences even more dearly than the wonders, because they are the things that prove you belong.”

“I had started trying—it for the first time, really—it to remember what had happened in that wood. I prodded tentatively around the edges of it, barely acknowledging even to myself what I was doing, like a kid picking at a scab but afraid to look.”

“...a tiny gemstone, a tiny spark of color slipping between your fingers and through the cracks and gone. A heart the size of a fleck of glitter and vibrating like a hummingbird, seeded with a billion things that would never happen now.”