I have a Nexus 7, limited to 16gb and a large ebook library. I use Cool Reader for my library. There's an app called Nexus Media Importer that allows streaming without rooting with an OGA cable attached to a flashdrive or SD Card Reader. I wrote to the developer and the addition of the following code would allow streaming epub and mobi books with Cool Reader:
"What they need to do is register an Intent Listener for http streams of the following types:"
Adding the code would give me access to my full library on the go.
I hope you'll consider adding the code in your next update.