Kathy to be honest, it's not too hard or fancy…. you can draw on fabric the same way you draw on paper.
These are the pens I use.

They are pigment ink. The black was done with the uni pin .5 pigma pen. In the USA you can use a Zig pen…. you can buy them at Hobby Lobby, Michaels and Crafts direct.

These pens and pencils are used for softer illustration. The pigma pens for the outline, the pencils for the illustration.

You can find out how to create an eye like this by  going to the pages link on the right hand side of the blog. Human Eye.

As for the book… wish I had more hours in the day…. I think I might do a DVD, I think that would be better…..