It is available as an ebook only from shoelace books. http://shoelacebooks.ecrater.com/
I will tell you that I recently abandoned it. My ds (3rd grade) is not ready for dictation, so I didn’t require it. He balked at doing the minimal daily work, as well. And I’m not sure he retained a lot of the rules, since I felt they were merely touched upon and not given a lot of emphasis.
Another problem I have with it didn’t show up on the sample on the website. There were a few places that had typos or sentences that didn’t make sense. The last selection we did, For Want of A Nail, contained the instruction, look at the word “daisy.” Well, if she meant in the selection, she should have said “nail.”
Just my .02. Hope it helps,
Karen