Writing in plain language, Kellogg, an attorney with a degree in philosophy, draws on the ideas of six great philosophers to answer what Immanuel Kant considered the three core questions of philosophy: What can I know? What may I hope? What should I do? Each section of the book is devoted to one question, and an answer is developed from a synthesis of ideas from two philosophers: one a builder of a system of thought and the other a destroyer of that same system. Plato and Wittgenstein offer contrasting perspectives on how we can truly know something. Kant explores the leap of faith, while Nietzsche celebrates the death of God. Examining issues of human virtue, Aristotle weighs in on public virtue, and Heidegger considers the meaning of authenticity. Chapters include biographical sketches of the philosophers; a brief bibliographic essay for each philosopher is included at the end of the book. Annotation ©2010 Book News, Inc., Portland, OR (booknews.com)