Overdrive is a great way to use KF to search for ebooks at your library and have them on your KF for the loan period you specify.
Here is the link for the OMC from their website:
http://www.overdrive.com/software/omc/AndroidEULA.aspx
you must hit the "agree" button to get the download onto your PC, then copy to the root of KF. Search for it with ES File Explorer and install on KF and open. Viola'.