There is and has been a King Crimson book availabe for awhile now detailing the bands history and the recording of classic albums such as 'In the Court of the Crimson King' and 'Larks Tongues in Aspic' etc. It's a great read, I reccomend it highly for any fan of the band.
There is also a website supporting the book with lots of reviews and various other interesting bits and pieces here:
http://www.inthecourtofkingcrimson.com/index.php?36