Soros book ok for a bookstore read; better is Neiderhoffer "Practical Speculation", more math and stats talk; Options, Pricing, and Volatility (Natenberg, 1994 2nd Ed) is a great book on market dynamics.
In reality, a good hi-level stats book on autoregression, distribution curves, and hypothesis testing will give you the edge you seek. Start with Statistics for Dummies then check out more advanced books in the Math/Engineering section in your bookstore.
Read some google-advanced-search papers on GARCH and Black-Scholes option pricing and volatility forecasting.
No one really gives a crap about direction it is volatility we seek