Biographies of some of the campaign heroes from the beta files by Avonu:
http://heroescommunity.com/viewthread.php3?TID=41078&PID=1321191#focus
Added after 3 hours and 29 minutes
Biographies of all heroes recruitable in the tavern, from the Hero's Corner:
http://heroes.riotpixels.com/?p=2011#more-2011
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