Stephen King’s book On Writing is a memoir mixed with advice about writing as a profession. I enjoyed reading it and learned a good deal as well.
My favorite quotes from the book:
Life isn’t a support-system for art. It’s the other way around.
Fear is the root of most bad writing.
If you want to be a writer, you must do two things above all others: read a lot and write a lot.
Good description is a learned skill, one of the prime reasons why you cannot succeed unless you read a lot and write a lot.