The Concept of Anxiety
All of Kierkegaard's books have either a preface, dedication, or prayer at the beginning. This book includes a lengthy introduction. "The Concept of Anxiety" was published on exactly the same date as "Prefaces", June 17, 1844. Both books deal with Hegel’s idea of mediation. Mediation is a common thread throughout Kierkegaard’s works. His work up to this point was to show that faith was being mediated by knowledge. Here he takes up the questions of sin and guilt.
Barrington Moore Jr.
In 1965, Moore, Herbert Marcuse, and Robert Paul Wolff each authored an essay on the concept of tolerance and the three essays were collected in the book "A Critique of Pure Tolerance". The title was a play on the title of Immanuel Kant's book "Critique of Pure Reason". In the book Moore argues that academic research and society in general should adopt a strictly scientific and secular outlook and approach theories and conjectures with empirical verification.