Well, this stayed unexpectedly action-packed start to finish so was fun (particularly when turning to the James Bond international espionage drawing in MI-6, CIA, FBI, NSA...).
I enjoyed the read.
Not sure it's what I'd consider Young Adult. Lots of romantic possibilities with yummy men (not what I'd consider a love triangle, thank goodness -- but definitely a PG or less explicitness so maybe that accounts for the "YA"? Lexi is an independent adult with degree, steady job, own home, not a teenager, not a 18-24 college student or new adult, not in any academy type of setting -- pretty much not seeing where this is YA.
Which is a good thing; YA is a love/hate for me with many great books but far more angst-y, clueless, high school-ish, and loveg ringlets.
Read for the booklikes' YA Book Club; I think it may have been just me unless someone has yet to join in or post.