ISAN by Mary Ting

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Synopsis:
The world has changed.

Scientists warned it would happen.
Meteors devastated the Earth. World Governments developed plans to help surviving citizens. The United States disbanded and salvageable land was divided into four quadrants—North, South, East, and West—governed by The Remnant Council.

Struggling to survive, seventeen-year-old Ava ends up in juvenile detention, until she is selected for a new life—with a catch. She must be injected with an experimental serum. The results will be life changing. The serum will make her better. To receive the serum Ava agrees to join a program controlled by ISAN, the International Sensory Assassin Network.

While on a mission, she is abducted by a rebel group led by Rhett and told that not only does she have a history with him, but her entire past is a lie perpetuated by ISAN to ensure her compliance. Unsure of who to trust, Ava must decide if her strangely familiar and handsome captor is her enemy or her savior—and time is running out.

*This ARC was provided by the publisher via Netgalley in exchange for an honest review*

I thought that the premise was very interesting. I like the idea of an agency that trains assassins and also the concept of having them injected with a special serum that makes them far more effective than they would otherwise be. It reminded me of Captain America in that regard with the exception of the assassins having to be injected every time they have a mission. 
I liked the main character. She wasn't naive by any means but is trying to survive is a world where she is essentially alone. When she is given a choice between remaining in juvenile detention or joining ISAN, she chooses ISAN which she feels is a no brainer. She comes to realize that all is not what it seems and that she may not last long there if her usefulness runs out. I enjoyed her tough take no prisoners attitude. She was pretty bada$$ and reminded me of a greener version of Nikita. 
I thought that the storyline was well done and I look forward to reading the next installment to see what choices Ava will make while at ISAN. I'm hoping that the author will explain more about the world and Ava's past. I got the gist of why there was so much destruction and why food was harder to come by but I'm not sure that I understand the governing body of the world that Mary Ting created.