CHAPTER 1

       Ariadne

      As I stand beside Cassandra, watching Boone’s eyes move between my face and that of my twin sister, a single thought keeps running through my mind: He’s going to die.

      I’m still shocked at Cassandra’s unexpected arrival in the museum, where Boone and I have been working to extricate the alien weapon that’s been hidden there by Evrard Sauer, the scientist who was studying it after its discovery by the Nazis. Sauer is now dead, entombed in the water-filled chamber 60 meters below our feet. The same chamber from which Boone has recently escaped for the second time.

      I look at the metal box Boone is holding in his hands. It’s the whole reason he descended into the room. Part of me is excited to see that he’s gotten it, and to know what’s inside it. Another part wishes he’d never found it, because I know what’s going to happen next. I’d hoped that by throwing the grenade down the shaft and into the underground room, I’d have warned Boone that something was wrong. Maybe he was too excited about finally getting the box. Maybe he thought he could help me. I’m thankful the blast didn’t kill him, which was a very real possibility, but I’m not sure it matters now.

      “Put the box on the floor,” Cassandra says.

      Even if we weren’t twins, I would have known this was coming. Cassandra might not be our Minoan line’s official Player, but she is a Player nonetheless. Maybe even more than I am. We trained side by side, and although I was the one who was presented with the golden horns at the choosing ceremony and have served our line to the best of my abilities, Cassandra has always longed to wear them. If she had been sent to Berlin instead of me, Boone would already be dead. Now she is toying with him, enjoying the confrontation.

      Boone glances at me. I can tell he’s confused. He doesn’t know if I knew about Cassandra being here or not, if I’m working with her or still teamed up with him. I wish I could let him know that my sister’s presence here is a surprise to me too, but I don’t dare risk showing any hint of caring about what happens to him. If I do, Cassandra will make things worse. For both of us. I keep my face blank and stare back at him coldly, trying to still my wildly beating heart.

      Boone crouches down, setting the box on the floor. Then he stands up again. Underneath Cassandra’s coat, which barely stretches across his shoulders, he’s wearing only boxer shorts and a thin undershirt, both of which are soaking wet. He’s been swimming around in ice-cold water, and the temperature in the room now is well below freezing. I can see him shaking as his muscles seize up and his body attempts to warm itself. He’s trying to control the trembling, but he can’t. He’s rapidly becoming hypothermic and needs to get warm. Although I want to go to him and wrap my arms around him, I can’t. I have to watch him suffer, and it makes my heart ache.

      Cassandra has had her pistol trained on him this whole time. She keeps it leveled at his chest as she says to me, “Go get it.”

      I don’t like her ordering me to do anything, but the situation is delicate, and I don’t want to risk upsetting