Can we ever act freely if everything we do is determined by our genes, our upbringing and our environment? On the other hand, if everything we do isn't determined, is it just a matter of luck what we do? What are the requirements on acting freely: are they easily satisfied by ordinary people so long as they aren't coerced or manipulated or suffering from compulsion, or does acting freely involve requirements that are difficult or impossible to meet? This introduction to the contemporary free will debate explores these questions in a lively and accessible way, with the emphasis on giving readers the intellectual tools to make their own minds up on this important and controversial topic.