I downloaded it using Adobe (its DRM free) and on the Kobo desktop app from the kobo site. See:
http://www.kobobooks.com/ebook/Kobo-...1pw/page1.html
I find it easier to use if i can read it on the computer while I have my Vox open to the section I am reading about. You can take the DRM free ePUB and sideload it to the Vox, if you wish.