The Cubase (xx) Power series is a good one, but to tell the truth the best thing I ever did was took a few hours to print out the manual and put it in two three ring binders. I could take it with me anywhere I went and just look in the table of contents and go "ya, I might like to do that sometime" and I would look it up and read about it.
Some people have gone to a copy center like Kinko's and had it done for them in one double sided bound book. I tried and the guy looked like he didn't want to do it and then realized an out and said "I need you to get this form filled out by them saying it's okay to copy this material." I pointed out I had a licence from them. No go. I pointed out they offer the manual on the net for free and he says "It's my job man". So I left the copy nazi to his little copy self and bought some ink for my printer.
I agree it would be nice to have the manual included, but on numerous threads with hundreds posting support for it on steinys site, has done no good other than to show us we are on our own as far as the manual is concerned.
Think about it this way, for the cost of some book that won't cover every detail of Cubase, you can print out the manual that DOES cover every detail of Cubase.