Help remembering which book ends with this small gesture by Bosch

One of the books ends with a small physical gesture by Bosch, which I'll describe below, but hopefully it doesn't qualify as a spoiler for anyone.

The big case has been wrapped up and as he's leaving the office he shows the tiniest amount of pride/excitement for what he accomplished: he bangs his knuckles down on one of the desks he passes then pumps his fist in the air once, never breaking stride.

Anyone remember which book this is? I thought it was A DARKNESS MORE THAN LIGHT but flipped through my copy and couldn't find the scene. It's not the ending of THE BURNING ROOM, which is definitely a similar moment and gesture, but still different.

Thank you!