Where Wizards Stay Up Late - The Origins of the Internet, by Katie Hafner & Matthew Lyon
It looked interesting, so I checked it out.
What a fascinating read. I couldn't put the book down. I ended up reading the entire book in one sitting.
From early meetings discussing the need to link distant computers together, all the way through the development of HTML and Mosaic (the first browser) this book details not only the technologies that were developed, but also the people and organizations that made it all happen.
It is written so even a person with no background in the underlying hardware, software, and protocols involved with the internet can read it and understand, but yet someone with a basic understanding of those concepts isn't put off.
This book is a really good read, and anyone with even the slightest interest in how the internet as we know it came to be should read it.