I've been playing with I Books so that I can produce patterns for sale on the web.
However, this is an experiment.
I finished this pattern in I Books and I have added it to the web page as a PDF. You can download it, or just plain look at it.
I will have I Books through ITunes eventually.
Go to the web page and click on I Books to see the pattern.
I have a long way to go, but in future all my class notes and descriptions will be done in this format.