The first section of the book is an autobiography mainly concerning King's early exposure to fiction and his childhood attempts at writing. He describes his early attempts to get published, his success with his first novel Carrie, and his subsequent development as an extremely popular author. King also discusses his problems with drugs and alcohol.
The second section is practical advice on writing, from tips on grammar to ideas about developing plot and character. King describes it as a guide for how "a competent writer can become a good one." He stresses his beliefs that a writer should edit out unnecessary details and avoid the use of unnecessary adverbs.