Great world building in this book. Enjoyed the set up of the super soldier, and the behind the scenes secret military operation. The falling in love kind of happens a bit more suddenly. Would have liked a few scenes to build to some emotions, mostly it's a chemical thing between them, maybe from his soldier alterations. I mostly see that characteristic in shifter romances more. But who is to say a super soldier is a bit like a shifter, really.
But, totally kept me wanting to read more and find out the ending. Good short read. And this is the first of a like, 19 book series. Phew! That's a lot of military men for ya.