In his sixty-plus years of publishing philosophy, Keith Lehrer has made groundbreaking contributions to epistemology (developing and defending a coherence theory of justification and knowledge), to the free will debate (introducing, critiquing, and defending compatibilism), and to philosophy of mind (defending metamentalism). Those working in these respective fields tend to be quite familiar with Lehrer’s contributions to their own field, but less familiar with his work in these other fields. We (the editors) believe that those working in epistemology will gain a deeper understanding of Lehrer’s epistemology by examining his views on freedom and metamentalism, and those working on freedom and metamentalism will gain a deeper understanding of Lehrer’s metaphysical views through exposure to his work on epistemology, because of the overarching role that metamental ascent plays in his philosophy.