I really did not care for the beginning section of the book. It was boring. Once it got past the initial stage, I really enjoyed it. The story is told as the memories of Publius Varrus, a former Roman soldier of noble blood who is also a blacksmith. Much of it concerns his relationship with Caius Brittanicus, an even higher noble who is his military commander for years and becomes a very close friend. The title comes from a rock which fell to earth thirty years prior from which Varrus’ grandfather made him a dagger of an unknown, extremely hard metal. Both Britannicus and Varrus become obsessed with the hunt for more of these stones. Their search takes place against the backdrop of a Britain preparing for the Fall of the Empire. Overall, an excellent story. I look forward to continuing the series.