If you’d been wondering how to do this, it’s a pretty straightforward process and the cost is only around $100 to convert your book into the correct format depending on size.
My own book has just gone live on the iBookstore : http://lnkd.in/qNGW8x
It’s not a quick process though, taking 3 months before it was live.
If you’d like to find out more, please contact me.