I've just come across a site that has on-line
copies of several
of Gordon Bell's (with others) books on computer architecture,
etc. (My apologies if I'm repeating something, I don't recall
seeing this posted here recently though).
A menu leading to the books is located at the following site:
http://beta.ul.cs.cmu.edu/webRoot/Books/Saving_Bell_Books/ -- along with a lot more
modern stuff just in case you're wondering what Gordon is up to these days.