The Future of Ideas was Lawrence Lessig’s precursor to Free Culture.  It is extremely tech-heavy and goes into great detail about the history and infrastructure of the internet, and the principles the internet was built upon.  He describes how these values of freedom and the free interchange of ideas are being corrupted by the extreme of copyright control in our society.  The drastic increase and rapid changes in technology have gotten out of hand, and there is no longer a balance between public and private goals.  Our past traditions can still come into play, and changes in technology do not have to alter our law or culture.  The DMCA is a good example of a flawed law put into place as a response to changing technology.  The juxtaposition of the early internet to what it is now is striking – the extremes of copyright and the lack of works in the public domain have severely stifled creativity.
The three main sections of the book are a discussion of the importance of “the commons” on the internet, how to recapture online creativity and innovation, and how to stop the increasing restrictions on the internet.  The first section details the need for more free resources on the internet, and a realm of works that are owned by everyone, without control to their use or access.  Lessig explains in detail the principles of the GNU/Open Source movement, and how important it is to the innovation commons, moreso because large companies lack the ability to quickly adapt to technology changes.  The second section illustrates how the constraints that stifle creativity on the internet need to be removed, and gives examples of online innovation such as HTML books, mp3s, and online cultural databases.  The need for new models and new ideas is strong.  The third section shows how the law is being manipulated by corporations, and their increasing control over web content.  Copyright and patent laws have been virtually re-written to stifle the creativity of individuals, and increase the control of government-backed media conglomerates. 
The book is as pessimistic as Free Culture, but does offer some ideas as to how to alter this negative process.  Lessig introduces the ideas of Creative Commons and 5-year copyright term renewals, if desired by the copyright owner.  He emphasizes the importance of removing special interests, and finding new ways to spread information for free.  He also encourages individuals to go after large corporations if they provide false claims to copyright.
This book is extremely important because of how it details the internet and online copyright issues.  It very accurately describes the foundation of the internet, and shows just how far away from that beginning things have gone.