I very much enjoyed Lisa Randall’s Knocking on Heaven’s Door, which provided a layperson like me with a cogent explanation of the Standard Model that underpins modern particle physics. Randall is a physicist with a knack for explaining things both enthusiastically and clearly; she’s a good storyteller who doesn’t get too bogged down in trying to get all the details right for us. So I was intrigued enough to put Dark Matter and the…