Overall, I liked the book, but felt that the main characters were a little 'flat' at times. More background on both Maya & Adam would have been nice, as well as more world-building in places as the story definitely hits you running.
To begin with Maya is not the most likeable being in the universe, but as you do get to know more about her she does grow on you, but rather than seeming strong and independent, she sometimes comes across as plain old stubborn and closed-minded. Adam too is a little slow to grow on you - he does not trust Maya, even after observing her actions, tarring all women with the same brush as it were.
Saying that, I did enjoy reading this book and will be buying the next in the series.