Today, I've withdrawn my self-published book GNU Make Unleashed from sale because No Starch Press have agreed to publish the book. I've been working over the last few months to completely revise, update and extend the book. That new edition will be published by No Starch Press. The title and publication date are still being decided. Still on sale over at Lulu (where I had GNU Make Unleashed) is my page-turner A non-mathematical introduction to ‘one-way functions’ and their use in securing passwords .