Yet another book confirming my very high opinion of Dorothy Sayers. This is her take on an epistolary novel, although it's not composed of letters only. As the title suggests, the novel consists of a range of documents which together form a prosecution brief. As is so often the case with Sayers, the mystery is only a part of what the book is about. While there is a mystery, the point of it is the "how" rather than the "who". The novel is also a dissertation on creation and the origin of life. I will freely admit that the science largely went over my head, but it actually didn't matter. I understood enough to be impressed. And then there was the wit, the passion and that fierce intelligence which characterises Sayers. In short, I loved it.