Does anyone have a good reference material for starting out? I have know background in 3d modeling and need to bone up so I ask inteliigent questions.

Not so much- "in 3d there is an x, y, z to move in", or "this is a boolean".... but more like- (when using constuction lines and doing the geometry) how to use the tangent, perpendicular (and what that is) to create my model.

I could just be asking "what is geometry math" to understand the lingo (which is nothing short of "go study Geometry") but if there was a tute more for this type of modeling that may lead me.

Thanks,
Burr