The Concept of Anxiety
The Concept of Anxiety (): "A Simple Psychologically Orienting Deliberation on the Dogmatic Issue of Hereditary Sin", is a philosophical work written by Danish philosopher Søren Kierkegaard in 1844. The original 1944 English translation by Walter Lowrie (now out of print), had the title The Concept of Dread. "The Concept of Anxiety" was dedicated "to the late professor Poul Martin Møller". He used the pseudonym Vigilius Haufniensis (which, according to Kierkegaard scholar Josiah Thompson, is the Latin transcription for "the Watchman" of Copenhagen) for "The Concept of Anxiety".
David H. Barlow
As Barlow's ideas of the nature and origins of anxiety started to become more elaborate, he published a series of books that delineated the results from his research and advocated for a more empirical scientific approach to clinical psychology. In 1985, he published the first edition of the "Clinical handbook of psychological disorders: A step-by-step treatment manual", explicating evidence based practices. Aggregating his ideas from this period of extensive research, Barlow published what the "American Psychologist" deemed as his "most influential book", "Anxiety and its disorders: The nature and treatment of anxiety and panic".