Proof Positive

"Just when Andrew and Evie think they're getting closer to their missing mother, she seems farther away than ever. Even if she's still in the same city as the twins, she could be anywhere, disguised as anyone. And she won't reveal herself until she's sure it's safe.
But there's no way to guarantee safety, not now. Because the Company is on to the fact that Mom is communicating withy Andrew and Evie, and their agents are watching the twins' every move. The Company is desperate, and they'll stop at nothing to lure Mom out of hiding. Even if it means using Andrew and Evie as bait..."