You might like Anna's archive. It isn't a quick way to get heaps of ebooks, but I bet you can download them faster than you read them. Haven't kept up on e readers in the last several years, I'm sure you can find a decent one on your own though. Avoid Amazon on general principles, and the kobo ones have Walmart integration FYI (bad)
Piracy
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Join my Myanonamouse. They have the largest collection of ebooks and audiobooks. It's 100% worth it. You can find nearly any title you're looking for on there. You can only join during a certain weekly window, and have to pass a test that is based on their rules, but it is absolutely worth it, my friend.
I did this and with no real experience, everyone there was and is extremely helpful and the material is excellent!
Yeah. Anonamouse is super rad. If you don't already have one, think about getting an external HD and have it just for anonamouse torrents. You'll get all your bonus points fast.
Anna’s Archive and an e-reader
What kind of e-Reader. I only know about kindle, but I imagine it is not easy to get my on downloaded books on there. Also, the new ones are a bit to expensive for my price range.
I have Kindle, simply download the file and share to Kindle. Bluefire reader can handle most formats, but for PDF, especially magazines, I use Sidebooks, displays them great on my iPad in landscape.
Edit: Try Mobilism for mags and books
You simply cannot go wrong with the new Kobo Clara BW. Cheap, fast, repairable. It’s my favourite object.
I use my Kobo with Calibre, an open-source piece of software to manage your library. Only had to log in once to the official Kobo account (when I first bought it).
Edit : not as awesome as the long-discontinued Sony e-reader, but I'm perfectly happy with it.
I use a 2011 second hand kindle. I convert the books with calibre to awz3 format and copy them over USB to the kindle. No amazon account needed.
I personally use an InkPalm 5 Plus but you can use a Lemon Read S61P also.
Are you open to audiobooks? I find I can listen a lot more often than I can read. There's a few good recommendations already here but for audiobooks, Audiobook Bay is pretty good.
oceanofpdf.com
Mobilism dot org and myanonymouse
I've never not been able to find what I want