My favorite kind of non-fiction writing is memoirs, especially when written by fiction authors where the focus is their lives as writers.
Stephen King's On Writing: A Memoir of the Craft is my favorite of the two that I've read. His life is an amazing combination of turmoil, poverty, a mother's love, a wife's strength and persistance, and so much God given talent that he could create in a drunken stupor or a cocaine frenzy or even stone sober.
I read this following bit on Amazon.com. I wished I had written it, then decided to just quote Tim Appelo, author of the Amazon article.
Stephen King "gives you a whole writer's tool kit: a reading list, writing assignments, a corrected story, and nuts-and-bolts advice on dollars and cents, plot and character, the basic building block of the paragraph, and literary models. He shows what you can learn from H.P. Lovecraft's arcane vocabulary, Hemingway's leanness, Grisham's authenticity, Richard Dooling's artful obscenity, Jonathan Kellerman's sentence fragments."
The other book I read in this "genre" is Janet Evanovich's How I Write: Secrets of a Bestselling Author. If you like Stephanie Plum, you'll enjoy this book too. It's got the same kind of humor with advice on how to get published as a fiction writer.
What are some other great titles about authors and their lives as writers written by the authors themselves?