3.5 stars. I wanted to love this book more than I did. I gave it a .5 star bonus for delightful nerd culture references that made me giggle. Overall, though it had all the elements of a successful PNR, somehow I just didn't give a crap by the time I was about halfway through. Figure out the mystery...or don't. Hook up...or don't. I would have yawned either way. Can't quite put my finger on why I didn't connect with this one, but, well, I didn't, and the nerd references just weren't enough for me to bother picking up book two.