Is there any free app to view mags and books?

I use both iPhone and Samsung and wanted to know if there was a app which could be used to read free books and mags.iBooks is great but it doesn't offer new books for free. I'm willing to jailbreak my iOS or root my android if needed. I can also pay for a service in which I can read all the books I want for a period of time.

There's ISSUU, where you can read a lot of magazines gratis:
http://issuu.com/

But you can see here, too:

http://magazinesdownload.com/

http://magazine3k.com/

http://www.allulook4.com/magazines/page/2/

https://play.google.com/...mlmcmVlIl0. (the website is in italian)

Bye! ^_^