The plain, ordinary bell he'd installed on the front door to alert him in his laboratory in the back when he had a customer chimed and he moved to the door, pausing as he reached it. That was when the power hit him, brushing over his own aura like a tidal wave. What the Hell just walked into his shop?

He took a moment to steel his reserve, to call to mind a few phrases of quasi-Latin and corral the uncertainty he was feeling about whatever just walked into his new office into something he could sling into a spell or two, slapped on what he hoped was a friendly customer service smile, and opened the door.

"Sorry for the wait." Nida wasn't what he was expecting, but he was definitely the source of the Powerful Big Thing he'd sensed walk into his office. "I'm Harry Dresden. How can I help you today?"