New step-siblings Q (short for Quest) and Angela continue to trail a ghost terrorist cell along with SOS, a team made up mostly of retired operatives from the CIA and other organizations. Angela's mother is climbing her way toward the top of the ghost cell, but the danger is getting higher all the time. Meanwhile, Boone may not be the only one with a mysterious ability, and there seems to be a mole on the SOS team or amongst their allies.

Here we have part 5 of the series-long story, the kind of series that you really need to start from the beginning. A lot more happened in this book than in the previous, which I'm glad for, because the previous wasn't as interesting as the earlier books in the series had been. I was concerned the second half of the series would end up being a let-down compared to the first half. I can't say that we get much in the way of answers in this book, but there were certainly some revelations. And the story really moved forward, with action comparable to what we see in the rest of the series.

One thing I've begun to notice in this book is that Q, as the main character, isn't the stereotype we might expect in a book like this—an action-loving kid who has taken to all of this adventure and danger. He's anxious and jumpy and will probably need some therapy in the future. It makes for a much more realistic story, even while there are some unrealistic things happening as well. I do wish the author had had the foresight to realize he might want to include some scenes from the POV of someone other than Q later in the series, though, and not started it in 1st person. I'm not a fan of changing between 1st and 3rd. Overall, though, I'm really interested to see how this series ends. ( )

I do think the action in the story is pretty good in these stories. The parts related to the Leopard and the terror cell are mysterious and tense, but I’m starting to worry that Q is going to have some serious PTSD by the end of the story, if he doesn’t already. He’s repeating himself quite a lot and constantly uncomfortable and worried. It had been a little annoying, all the rambling and fidgeting, and it really slowed down the action and the story’s pace, but the more I think about it, it’s reasonable to expect a 13yr old to experience these situations in this way. So I’m not complaining about the writing, I’m just saying that if these were real kids, they’d be in for years of therapy. If Q wasn’t exhibiting symptoms, I’d probably blissfully suspend disbelief and go along with the idea that these kids are perfectly managing the danger and deception of the last week and a half.

I’m still not sure what I think about the genre mash-up they’ve got going on, and I’ve got some ideas on what the end is going to look like, but I’ll have to see how they resolve it to really settle on an opinion of everything. ( )

After Q and Angela help foil a Ghost Cell plot in San Antonio, they head to Chicago, the next stop on the Match tour. Since they've been busy fighting international terrorism, they're behind on their school assignments. Their parents tell them if they don't get caught up, it's off to boarding school. But who can concentrate on homework when there is a mystery to solve and international terrorism to thwart? Angela is obsessed with finding out more about the mysterious Boone. Q is more interested in not going to boarding school. But when Boone and his SOS crew are ambushed on their way to Chicago, it becomes abundantly clear. Someone inside their inner circle is feeding the Ghost Cell information. As they dig ever deeper to learn the identity of the mole, Angela and Q uncover the Ghost Cell's next plot. And it's much, much worse than a car bomb. They plan to unleash a chemical weapon over the skies of Chicago. And it's up to Angela and Q, along with Boone and Croc, to stop them. ( )

After Q and Angela help foil a Ghost Cell plot in San Antonio, they head to Chicago, the next stop on the Match tour. Since they've been busy fighting international terrorism, they're behind on their school assignments. Their parents tell them if they don't get caught up, it's off to boarding school. But who can concentrate on homework when there is a mystery to solve and international terrorism to thwart? Angela is obsessed with finding out more about the mysterious Boone. Q is more interested in not going to boarding school. But when Boone and his SOS crew are ambushed on their way to Chicago, it becomes abundantly clear. Someone inside their inner circle is feeding the Ghost Cell information. As they dig ever deeper to learn the identity of the mole, Angela and Q uncover the Ghost Cell's next plot. And it's much, much worse than a car bomb. They plan to unleash a chemical weapon over the skies of Chicago. And it's up to Angela and Q, along with Boone and Croc, to stop them.