When I checked out on the 767 years ago, I went out and bought all the crap I could find, including Honeywell's manual, which wasn't worth a darn.
The only guide that was worth the bother was the Big Boeing FMC Users Guide by Bulfer and Gifford. Lot's of neat little stuff I haven't seen anywhere else.
Googled it, and its still available here...
http://www.fmcguide.com/catalog/