The Between Two Worlds blog has highlighted a fantastic opportunity to get a free book. Basically you get to preview, review, and then receive a free copy of John Owen’s Communion with the Triune God.
So as you can see, it is not 100% free, as you have to read the book (you are supplied with a pdf) and then review it before you get the free hard copy of the book. Nonetheless, this is a great opportunity if you are willing to do that.
I’ve already got my copy, but Crossway will stop sending out any more PDFs after October 1, so don’t wait too long!