This book isn’t really about the crime itself, but about the jurors who sit to judge it in court. Each of them has their own experiences, some of them shadier than others, all of them changing the way they look at the woman in the dock. The mystery itself is wholly second to the examination of why each character decides to vote guilty or not guilty. It’s a clever story, albeit rather shallow — after a few characters on the jury, the author gives up really giving them backgrounds and personalities, because twelve is too many to really handle. It makes sense, but it also makes some parts of the deliberation of the jury rather perfunctory.
Overall, it’s clever enough and entertaining, if not massively difficult to figure out, or really all that good a psychological examination of juries.
Warning: one thing that may be distressing for some folks is that a pet rabbit is brutally killed (in a way designed to distress its owner). I honestly found that bit rather disturbing. Yeesh.