In March of 2005 Dr. Peter H. Salus started writing a book which he posted a chapter at a time on Groklaw. You may recall that Groklaw is a website that sprang into prominence after SCO filed suite against IBM. Part of Groklaw's goals were to analyse and report on the case and to help gather up historical information about the development of Unix and Linux (and everything related) such that it could be used to dispute the claims of SCO.
It appears that the SCO vs. Novell case has come to an end today.
Getting back to Dr. Salus' book, it is entitled, The Daemon, the GNU, and the Penguin: A History of Free and Open Source. A while ago I discovered the book on Groklaw and since it is licensed under a Creative Commons Atrribution-NonCommercial-NoDerivs License I gathered up the web pages and assembled them into a nice printable format (PDF) which you can find as an attachment to this blog entry.
Some years ago I purchased Dr. Salus' A Quarter Century of UNIX and really enjoyed it. Unfortunately I loaned it out to a student at Rocky Mountain College who was doing a report and don't think I ever got it back. Oh well, there are plenty of used copies for sale.
Give The Daemon, the GNU, and the Penguin a read. It is worth your time.