Kindle. A recommendation from Tigôn, who read it in tiếng Việt. It's a solid and enjoyable murder mystery, airport-novel style, a page turner, but inverted: we always know who did it. Perhaps this is a common trick in this genre I rarely visit. Misato seems a lot more perceptive than Yusako, and I thought she'd come to the fore later on, but she never really moves into sharp focus. Quite a few movies were made from it.