Paul Wellens has been a senior product manager for a major computer company in the Los Angeles area and Silicon Valley for over two decades. Before that, he used to install Unix systems and train companies in Europe, from his native Belgium. Later in his career, he became a web development aficionado because it brought him back to another passion of his: programming. This is not his first book. His prior publication is of a different nature. Nature is what it is all about as it is a guidebook on Eastern California, which is illustrated with his own photographs. Therefore, it should not come as a surprise to learn that, besides experimenting with new web technologies, his major hobbies are photography and hiking in the Eastern Sierra.