So I got a Kobo Libra recently, with the express purpose of reading library books with OverDrive. However, I found that I suck at starting books in a timely manner, and I now wish to buy books directly. However, the books I do plan to buy are relatively popular and expansive series. When I look up if they are sold in collections, I either get no results or Amazon links, which are for Kindle and I have no idea if I’d be able to freely copy/move them to multiple devices. Is there a website(s) that sells popular books as ePUBs without DRM? Or is there otherwise a way to buy ebooks on Amazon, download them on my PC, and then turn them into DRM-free ePUBs to read on my Kobo?