I agree with MsMiz - Are Tanner and Niall boys (or girls) or men? And are we really supposed to believe they are crack-shot undercover agents (of a sort)? Really? They seem incredibly unable to focus when lives are in danger so they prove to be a danger to themselves and others as well. Sheesh. The 'undercover story' part of this is just not well done enough for me (some of us do read le Carré after all!!!) nor does it meld well with these characters.
That being said... insert big dopey, smiley face here... if you want squishy, moony, wordy, yearning romance mixed with hot, steamy, fabulous sex then this is the read for you -- it gets 3 stars for that alone -- just forget the rest of it.