Hi Alan,
Upon looking into this further, it seems this product only comes with MRR (as the highest license). Which means, unfortunately, you can only sell this product ‘as is.’
I took a look at the website you provided and it seems they’re no longer in business. This doesn’t mean the author is not somewhere online selling this book themselves, so it’s hard to say.
It seems this product was first created in 2005, so it is an old book, and if you were to fully rebrand and recreate the ebook, you’re doing this at your own on will. I do not suggest doing this, but the choice is totally up to you.
I hope this helps and feel free to ask any further questions.
"The path to success is to take massive, determined action".