Help re downloading books:
https://support.google.com/googlepla...r/179863?hl=en
It's really not obvious for a first-time user. I had to search online help the first time I bought a book. I hadn't even noticed those three little dots, and even if I had, it never would have occurred to me that they represented a menu button.
I also buy epubs from booksamillion.com and once you've bought a book there, it has a link that says "download".