Though old, most of the XW/Wraith series are great. They of course introduced two of my fave EU characters - Corran Horn & Whistler(his droid). Make sure you read "I, Jedi" afterwards which focuses on Corran. Dont forget the XW comics too !! Alot of the earlier ones are *awesome*
You can actually get most of the novels collected into 'omnibus' editions nowdays.
Asinus asinum fricat