Being and Time Heidegger's "description of the world of phenomena" to be "fascinating, but maddeningly abstract". He suggests that much of "Being and Time" is a "description of a private spiritual journey" rather than genuine philosophy, and notes that Heidegger's assertions are unsupported by argument. Stephen Houlgate compares Heidegger's achievements in "Being and Time" to those of Kant in the "Critique of Pure Reason" (1781) and Hegel in "The Phenomenology of Spirit" (1807) and "Science of Logic" (1812-1816). Simon Critchley calls the work Heidegger's "magnum opus", and writes that it is impossible to understand developments in continental philosophy after Heidegger without understanding it.
Nietzsche: Philosopher, Psychologist, Antichrist 1974. In 2013 an edition with a new foreword by the philosopher Alexander Nehamas was published. "Nietzsche: Philosopher, Psychologist, Antichrist" was reviewed by Chris Terry in "Times Higher Education". The book was also discussed by the philosopher Richard Rorty in "The New Republic". Rorty described the book as "path-breaking", but wrote that it had been superseded by the philosopher Richard Schacht's "Nietzsche" (1983), which in Rorty's view was more comprehensive, better organized and more helpful to readers who were new to Nietzsche and needed help in understanding the apparent contradictions in Nietzsche's views. "Nietzsche: Philosopher, Psychologist, Antichrist" received positive reviews