Deception by Teri Terry

An epidemic is sweeping the country.
You are among the infected. There is no cure, and you cannot be permitted to infect others. You are now under quarantine. 
The 5% of the infected who survive are dangerous and will be taken into the custody of the army.

As the epidemic spreads, survivors are being hunted like witches, for the authorities fear their strange new powers.

Kai is desperate to trace Shay, who tricked him and disappeared. Meanwhile, Shay is searching for the truth behind the origins of the epidemic ... but danger finds them wherever they go. Can they outrun the fire?

review by Maryom

It's always difficult to know where and how to start with a review for a second (or third) book of a series, so my first simple step is to just quote the synopsis above which appears on the book itself, adding that Kai and Shay have been on the trail of his missing sister, and uncovered far more than they'd expected, especially that her disappearance was somehow connected to the 'flu' epidemic sweeping the country.
The end of the first book of the series, Contagion, left them at a logical sort of place but with so many questions unanswered that I've been longing to read more. Deception is definitely the name of the game this time. Kai and Shay are trying to find answers - how did the epidemic begin?  is their ever likely to be a cure? what happened to family and/or friends? - but it's not easy to find any when so many people, at both a personal and official level, are covering up the truth. It seems at times that one layer of deceit is removed, only to find another hidden below. When I'm reading adult crime fiction, I always pride myself on guessing the villain and having an inkling of how the plot will pan out - here, I'm stumped. Although I feel I'm better than Kai and Shay at picking who to trust, or not (yes, I was mentally shouting 'Don't believe X. They're up to no good'), I still can't guess how the plot will develop or who, if anybody, could be the 'good guys' in this scenario.
Add in some fast paced action, secret hideouts and military bases, the possibility of some secret research lab experimenting without any official control, and a hint or perhaps more of a love triangle, and it's easy to see any reader would be hooked.
How would I describe it? Well, definitely a thriller, with a slightly sci-fi/conspriracy theory feel as it involves secret scientific research. Whatever you call it, Deception is an excellent, tense, thrill a minute, unputdownable read. The danger is real and ever-present, any moments of calm are short lived, and before long Kai and Shay are plunged back into action and life-threatening situations. With that in mind, I'd suggest that it might possibly be a little scary for readers at the younger end of its age range, especially if they're inclined to identify too much with characters; I can easily imagine them becoming so engrossed that it becomes 'real'.

Maryom's review - 5 stars
Publisher - Orchard Books
Genre - teen, sci fi/ conspiracy theory thriller