Levi greeted me at the front door in a loose gray T-shirt and jeans, his feet bare. He pushed his glasses up his nose with a boyishly awkward gesture. "Come in."

I sniffed the air hopefully, but he hadn't made biscotti.

"We broke Olivia's code," he said.

"Mazel tov." I slipped off my shoes.

The two of us headed into his study.

I waggled my fingers in front of the glass and a skinny little neon tetra swam over to investigate.

Levi ...