With my iTouch I found if I send books converted to the epub format to the device from Calibre I can read them in the free iBooks app. I prefer Stanza over iBooks. There are directions
http://www.mobileread.mobi/forums/sh...ad.php?t=42023
that may help you set up Calibre's content server which makes it a breeze to put epub formatted books on an iTouch.