Another great book is A Fine Line:
http://www.amazon.com/Fine-Line-Tech...8556044&sr=1-8
I also draw and sketch a LOT. I don't like the clear vinyl technique as much as I like drawing the blocks and laying tracking paper over them to sketch my designs. Mostly because I find it cumbersome and difficult to find a work space to lay out the quilt, then layout the vinyl on top of it. Additionally, I guess I have never found the correct dry-erase or wet erase markers because every single one I have tried has left shadowing of what I previously drew and it distracts me too much. So paper works for me with my quilt blocks drawn to a smaller scale if they are large. Once I get a sketch I like I will refine the design and draw it actual size, if I haven't already.