There are many good books on homebrewing currently available, so why did I write one you ask? The answer is: a matter of perspective. When I began learning how to brew my own beer several years ago, I read every book I could find; books often published 15 years apart. It was evident to me that the state of the art had matured a bit. Where one book would recommend using baking yeast and covering the fermenting beer with a towel, a later book would insist on brewing yeast and perhaps an airlock. So, I felt that another point of view, laying out the hows and whys of the brewing processes, might help more new brewers get a better start.
You can enjoy the great book on home-brewing online, the first edition, on the site of the author, John Palmer.
At the same time, I've downloaded the latest, third edition, into my Kindle and going to spend a few hours tomorrow morning with this book, getting into insights of beer brewing.