Good for you!68k related, I finally found original copies of Inside Macintosh. I've been itching to do some programming for my Macintosh Plus, and now I finally have the reference materials I need!
I'm curious: did you get the "3 volumes in one" book, or multiple volumes on their own? If so, which ones? I just have the "3-in-1" volume, which doesn't cover the Mac Plus.