I personally just use iBooks as my personal content server / ebook reader. Get your epubs somehow and drag & drop to iBooks. It syncs with all of your devices

I personally just use iBooks as my personal content server / ebook reader. Get your epubs somehow and drag & drop to iBooks. It syncs with all of your devices whiles using your iCloud account. It's very easy, and I've found iBooks the nicest ebook reader yet. I like it better than amazon's kindle apps and you can use an open format.