Author here. Yes, I can confirm that if you order the ebook now you will get the full ebook. The physical books have also been printed, so they'll probably get shipped before the 25th (don't quote me on that).
but we cant download it unless we buy the physical copy !!
I'm not sure where you're seeing that. I see an option to buy the e-book only for $23.95 and the page has red text that reads "Full PDF, ePub, and mobi ebooks now available!". Am I missing something you see on the page?