entropy increases, but why entropy was low at the beginning of the universe. Taking a time-symmetric view, he then speculates that entropy may decrease again, reaching a minimum at the end of the universe. Chapter 3 - New Light of the Arrow of Radiation This chapter discusses the apparent asymmetry of radiation. Namely, radiation is often observed spreading outwards from a source, but coherent radiation is not observed converging in a sync. Price criticizes explanations of this phenomenon from Karl Popper and Paul Davies and Dieter Zeh. The Wheeler–Feynman absorber theory is discussed and Price concludes that the arrow of time from radiation is a more general case of the thermodynamic arrow of time. Chapter 4 - Arrows and Errors in Contemporary Cosmology In this chapter Price tackles the problem of why entropy was low at the big bang and whether or not we should expect entropy to be low at the other temporal extreme of the universe. He introduces the Gold Universe model, which suggests that the universe will begin and end in a low entropy state. Explanations from Stephen Hawking and Paul Davies of the low entropy big bang are scrutinized. Price concludes that both Hawking and Davies apply a 'temporal double standard' with different standards being applied towards the past and the future. Thus, Price concludes that the arguments are flawed. The Gold Universe view is defended and some of its implications are explored. Chapter 5 - Innocence and Symmetry in Microphysics Price explores what he calls 'The Principle of Independence of Incoming Influences', which is the idea that systems are uncorrelated before they interact, but become correlated after interaction. He distinguishes two versions of this claim. The first is the macroscopic version which Price claims is associated with the low entropy past. The second is the microscopic version, which Price terms μInnocence. Price argues that, while the low entropy past gives us some reason to accept the macroscopic version, there is less reason to accept μInnocence. It is argued that, while μInnocence is intuitively plausible, it arises from a temporal double standard with respect to causality. Chapter 6 - In Search of the Third Arrow This chapter explores the idea of causation. Price argues that ideas about causation exert greater influence on physicists than is generally acknowledged. He explores the argument that the temporal asymmetry of causation comes from physical asymmetry, but ultimately finds this argument