Michael Grant said this quote

“ Little Pete. He’s not exactly just Astrid’s autistic brother.” He explained briefly while Toto added a chorus of “Sam believes that’s true” remarks.“How do we get Little Pete to do anything?” Dekka asked.“The last time Little Pete felt mortal danger he made the FAYZ,” Sam said. “He needs to be in mortal danger again.”Jack and Dekka exchanged a wary look, each wondering what the other had known or guessed about Little Pete.“Little Pete?” Jack asked. “That little kid has that kind of power?”“Yes,” Sam said simply. “Next to Pete, me, Caine, all of us, we’re like . . . like popguns compared to a cannon. We don’t even know what the limits of his powers are,” Sam said. “What we do know is we can’t communicate with him very well. We can’t even guess what he’s thinking.”“Little Pete,” Dekka muttered and shook her head. “I knew he was important, I got that a long time ago. But he can do that? He has that kind of power?” She pondered for a moment, nodded, and said, “I see why you kept it secret. It’s like having a nuclear weapon in the hands of, well, a little autistic kid. ”