I checked in with the lobby guard, who phoned up to the campaign. She did a creditable job with my name, Petra having probably accustomed her to it. The guard looked at my passport, printed out a pass, and directed me to the elevators that would carry me to 41.

When I got off the elevator, I barely had time to admire the giant red-white-and-blue posters with Brian’s bright smile and keen eyes. A thirty-something woman, with a mass of reddish curls, hurried through the double glass doors to greet me. She was carelessly dressed in a yellow shirt whose tails partly hung out over a floral-print skirt, and she started speaking almost before she was through the doors.

“Where have … Oh! Who are you?” Her hands, which she’d been brandishing in annoyance, fell loosely at her sides.

“V. I. Warshawski … Who are you?”

“Oh! Petra’s cousin, the detective. Petra forgets her ID about once a week, and the front desk has to call for permission to let her in. I was hoping this meant she’d shown up. Where is she?”

“I wish I knew. I want to find out what she’s been working on to see if it’ll give me any hint about where she might have gone.”

The woman glanced uncertainly at the double glass doors. “Maybe I’d better ask Mr. Strangwell. She’s been doing more for him lately than for me.”

“You’re …” I squeezed my eyes shut, trying to remember if Petra had ever called her boss by name.

“Tania Crandon. I run the NetSquad, which is where Petra started. Before she got so important that she only takes orders from Mr. Strangwell.” When she realized how resentful she sounded, the skin at her throat and chest flushed in the blotchy way that afflicts very fair people.

She was wearing an ID around her neck, which she swiped against a pad on the doors. When they clicked open, I followed her into the campaign hive. Her cellphone tweeted to let her know she had messages coming in. She glanced at these and thumbed responses as we walked past campaign workers. They were gathered in knots over computer screens, arguing in corners, answering cellphones and landlines, shrieking news at each other across the tops of cubicles.

Ms. Crandon looked like a senior citizen in here. Most of the staff was Petra’s age. Regardless of race or sex, they all seemed to share my cousin’s exuberant energy. Maybe Krumas really did signal a change in politics as usual in Illinois.

Various youths scurried up to Tania with questions. One asked for Petra. They couldn’t respond to some rumor on drilling for oil in the Shawnee National Forest without her input, she’d been doing the research.

“See me after lunch,” Tania said. “I’ll have something for you by then.”