O’Reilly seems to take the same standpoint as Craig Mod. And like Mod, I think that O’Reilly will benefit from this. People like free things. Why else are we constantly bombarded with “buy one, get one free?” (especially as holiday season intrudes upon us) By giving this book to readers for free, O’Reilly is possibly placing their name in people’s heads. When you want to buy a book, instructive or otherwise, why not check O’Reilly first? It might be free and if not, well, still buy it from them because you like that the company is willing to give things to their readers.