I've found a so-called "Fast Track Guide", an excerpt from the strategy guide at Prima's Homepage :
http://www.primagames.com/strategy/guide/1507This one is about Arcanum. If you activate the link "next" there, you'll read more. <img src="/ubbthreads/images/graemlins/winkwink.gif" alt="" />
There is for example more about the char's backgrounds and bonuses got by this ...