Calibre is a rather painful tool, but seems to remain the best.

Calibre web and calibre web automated downloader remove a fair bit of the clunk.

Yep. Go to yandex, search for book, download ebook, done. I’ll order a hardcover of the book if I liked it. I don’t mind reading on an iPhone (iBooks will open it and even sync it across devices). If I did, I’d use Calibre to load books on a kindle. I did this recently as a test and it worked on the second version ever made of the kindle.