What is the author's style in On Writing: A Memoir of the Craft by Stephen King?

The book is written by Stephen King, a successful novelist. Stephen King wrote this book in order to share his thoughts on writing to the aspiring writer. Since Stephen King is a highly successful novelist, he has lived the experiences that an aspiring writer would not only like to learn from, but perhaps live some day. Every aspiring writer dreams about the day when they will see their name in print. Reading how success happened to someone that the aspiring writer might admire makes the dream seem more real, almost attainable. This success as a writer makes Stephen King an expert on this subject, thus making his perspective authoritative.