Whether human choices and actions are causally determined or are in a way free is one of the trickiest questions in philosophy. Undaunted, Mathew Iredale presents a clear, comprehensive and concise introduction to the topic. What sets this book apart is its focus on the positions currently jostling for acceptance rather than on the more familiar historical debates. The book explores what it is about the free will problem that makes it so intractable and argues that the only acceptable solution must be one consistent with what science tells us about the world. It is here, maintains Iredale, that many works on free will, introductory or otherwise, fall down, by focusing only on how free will relates to determinism. He shows that there are clear areas of scientific research which are directly and significantly relevant to free will in a way that does not involve determinism. Although these areas of scientific research may not allow us to solve the problem, they do enable us to separate the more plausible ideas concerning free will from the less plausible.