Good news: John Owen’s Overcoming Sin and Temptation (ed. Kelly M. Kapic and Justin Taylor; with a foreword by John Piper; Wheaton: Crossway, 2006) is now available for free as a PDF here. (HT: JT.)
Bad news (for me): I just bought this book last week from amazon.com, and it’s too late to cancel the order. Oh well. At least in this case, the good news far outweighs the bad news!