Some authors come up with ideas for stories and share them. Some cover news, some write stories that others came up with. It all depends on what specific field they work in.
Preparations : Taking Arts and English would help. And depending on what you like to write about Science would help you write Sci-fi and various other genres and History would help you write non-fiction.
Schooling Typically Required : Authors typically need a High School diploma or equivalent, and a Bachelor's Degree. Authors most also complete some on-the-job training.
Employment / Outlook The need for authors hasn't increased dramatically or decreased dramatically as of late. It has been consistent. But personally I think there should be more authors, to get people thinking more.
I would like to pursue this career because literature and other art forms have helped me through a lot, and always will be a safe place for me. I want to help provide a safe hiding, healing, and coping place for others who are going through their own problems. I want to make others feel something, anything. Feeling something is better than feeling nothing at all, this I have learned firsthand.