Pacific Vortex! is an adventure novel by Clive Cussler. Though not the first book to be released featuring the author's primary protagonist, Dirk Pitt, Cussler states that this was the earliest story he wrote starring the popular action hero. Begun in 1965, it was published in 1983 after much internal debate and a great deal of prompting from his friends, family, and publisher. Cussler states in the foreword that he feels the novel is not up to his usual standards and should be treated as a sort of historical curiosity. Source: Wikipedia (en)