If alternatives to wealth management firms are interesting to you, you might like Burton Malkiel's "A Random Walk Down Wall Street".

http://www.amazon.com/Random-Walk-Down-Wall-Street/dp/039332...

If you're interested more on how companies previously invented metrics to make themselves look more valuable than they are and how this led to speculative insanity, and a general introduction to investing and economics, try this book:

http://www.amazon.com/Random-Walk-Down-Wall-Street/dp/039332...