I like using e-reader because it’s cheap, better on the eyes, the battery lasts forever, and generally screens are bigger than the phone. Also not killing your phone battery showing text is a plus.

I’ve been kicking around a couple of nook simple touch for several years. it’s ancient, android 2.1! It was easy to jailbreak them and add a launcher, and a couple sane ebook readers (though you’ll have to find older versions of apps that will work with eclair). pop stuff on it over usb, and it’s on there. The ones with backlights are getting super rare, but if you don’t care about that you can probably snag one for round $20 places like ebay.

Really can’t beat that, costs more to get a power bank to keep from killing your phone reading things.