Free as in Freedom  Free as in Freedom: Richard Stallman's Crusade for Free Software () is a free book licensed under the GNU Free Documentation License about the life of Richard Stallman, written by Sam Williams and published by O'Reilly Media on March 1, 2002. Williams conducted several interviews with Stallman during the writing of the book, as well as with classmates, colleagues of Stallman, and his mother. The book has received positive reviews. The book is divided into a preface, thirteen chapters, an epilogue, three appendices and an index. A copy of the GNU Free Documentation License (GFDL) is included as Appendix C.  "Free as in Freedom" was published under the GNU Free Documentation License version 1.1, which allows modification and redistribution of the text, photographs contained therein, as well as the cover: its texts, photograph and elements of design. Williams has written an article about the process of writing "FaiF", recording the license negotiations that led to this book being published under a free license. OnLamp also interviewed Williams in 2002 about the writing process. In the book, Bob Young of Red Hat supports the free software movement by saying that it enables people to stand on the shoulders of giants. He also says that standing on the shoulders of giants is the opposite of reinventing the wheel. An excerpt from the book:  "In the western scientific tradition we stand on the shoulders of giants," says Young, echoing both Torvalds and Sir Isaac Newton before him. "In business, this translates to not having to reinvent wheels as we go along. The beauty of [the GPL] model is you put your code into the public domain. If you're an independent software vendor and you're trying to build some application and you need a modem-dialer, well, why reinvent modem dialers? You can just steal PPP off of Red Hat Linux and use that as the core of your modem-dialing tool. If you need a graphic tool set, you don't have to write your own graphic library. Just download GTK. Suddenly you have the ability to reuse the best of what went before. And suddenly your focus as an application vendor is less on software management and more on writing the applications specific to your customer's needs." Another excerpt from the book:  Integrating GCC improved the performance of Linux. It also raised issues. Although the GPL's "viral" powers didn't apply to the Linux kernel, Torvald's willingness to borrow GCC for the purposes of his own free software operating system indicated a certain obligation to let other users borrow back.