In Ultimate Freedom, Keith Lehrer presents his most comprehensive analysis of the nature of free will and its related concepts such as freedom, autonomy, free choice, preferences, and power preferences. It is in significant part a synthesis of his many previously published works on the topic stretching over several decades, though it contains considerable elaboration of his previous thinking. In particular, he both epistemologizes and metamentalizes his analysis of free will to a greater extent than he had done in the past, placing greater emphasis than many free will theorists have done on considerations of knowledge and metacognition. He also distances his analysis of freedom from certain leading competing theories, such as Peter Strawson’s, Harry G. Frankfurt’s and John Martin Fischer’s.