I found out about it the way I found out about most things that happened between Luna and Cole — through Luna, in my kitchen, at a speed that suggested she had been containing the information at significant personal cost. She sat on the counter. She had a pastry. She had the expression of a woman who has decided that today is the day she tells someone something. "He held my hand," she said. I turned from the stove. "When?" "Perimeter walk," she said. "I asked if I could come — I do that sometimes, ask to walk the perimeter with whoever is doing the check, because I like knowing the edges of things. He said yes. We walked." She looked at her pastry. "The northern edge. Near the tributary. And at some point—" She paused. "At some point I was standing close to the bank and he put his ha

