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.
L. Ron Hubbard
He wrote in January 1949 that he was working on a "book of psychology" about "the cause and cure of nervous tension", which he was going to call "The Dark Sword", "Excalibur" or "Science of the Mind". On March 8, 1949, Hubbard wrote to friend and fellow science-fiction author Robert Heinlein from Savannah, Georgia. Hubbard referenced Heinlein's earlier work Coventry, in
in which a utopian government has the ability to psychologically "cure" criminals of violent personality traits. Wrote Hubbard: 
His first published articles in Dianetics were "Terra Incognita: The Mind" in the Explorer Club Journal and another one that impacted people more heavily in Astounding Science Fiction.