The definition of a 'beach read' in my estimation--hard to put down, and I read it in two days. It's plot-driven, though the shifting narratives give it a bit of character-study injection. I enjoyed guessing throughout what might have transpired (and this momentum of my guesses was what kept me reading without much stopping), and though I guessed correctly, there was still a lot of interesting things to happen along the way. The ending felt abrupt, but perhaps that's because the whole book was escalating to a point that anything afterwards would seem disappointing. I liked it, and definitely recommend for a quick, compelling read... though there's not much substance left after it's over.