The lovely people at Good News Crossway have added a free copy of Mark Dever's The Message of the Old Testament, to the NT volume that they sent me a few months ago.
Review of The Message of the New Testament: Promises Kept. A review of the Old Testament volume will follow in due course - when I've digested at least a reasonable proportion of the book (which is huge!).
You might remember the box that Humility arrived in. By contrast this book arrived in a box barely big enough to hold it... in all cases, I'm very thankful for free books.