Thanks folks!  I revisited that 3D Modeling in Silo book last night.  It seemed confusing some weeks ago when I started to go through it, but after the Modo course it's seems to the point and straightforward.  I would have forgotten about it sitting on the shelf hadn't it been mentioned.  Like all other types of learning: I have to go through it on the weekend(s) to get to build up my basic (vocabulary and grammar type) skills in the package, before going on to the more advanced video tutorials.