This book fell kind of flat for me.
In a book about spies, no one should be quite what they seem.... and yet in this book it seemed everyone was.
I kept waiting for the twist.... which friend was really a foe? Or vice versa. And it just never came.
It was a little like Nancy Drew grew up and joined the CIA. (Yes, I know Harry Tate is male and British- it's not a perfect comparison.)
Also struggled with all of the British-isms, so to speak. I can deal with wording that sounds terribly awkward to an American reader and spelling that simply looks atrocious, but all of the governmental alphabet soup needed explanation. I have a hard enough time keeping up with my own government's mess of letters.
I might read the next one to see if it gets any better, but I'm not sure I'm sold.