As the synopsys says, this a book about how Soros views the market and current (at the time he wrote) economic theory, rather than a get-rich-quick guide.
It is massively complex in the ideas presented, necessarily so. I did find my self re-reading certain pages, sections two or three times to get my head around the points he was trying to make. Having said that, I think that the ideas were as simplified and accessible as they could get, whilst retaining the points the author was trying to put across.
George Soros is essentially presenting an opposite theory of how markets work to that of Scholes et al. As Soros's fund is a practical application of his theories, the successes of that may be equated with the value of what he says. However, Soros is pushing a theory that markets are unpredictable and irrational and that models are a straw man ... really saying his speculation is largely an exploitation of that knowledge.
The opposing view (from around the same time) was being implemented practically by Scholes, Meriweather and others in LTCM (See "When Genius Failed"). To see how both sides where successfully exploiting more naive market participants see "All that Glitters".
After the dramatic failure of LTCM, more sway was given to Soros' point of view, largely as his successful fund had been battered but survived more or less in tact. Some time in more recent history that fund also took a big kicking. Bizarrely this does give some more credence to to the theory Soros puts forward .... he is saying that one makes money in markets by being maverick and ignoring popular theory, so once people started copying him it is time to change the game plan or face the consequences!
All in all a very interesting thesis, especially to anyone with any knowledge of the man or the markets. Although it is economic theory and market psychology, etc, it is written more as manifesto and so engaging and accessible.
Not for the newcomer though, it would probably pay to have read a bit about trading, derivatives etc before attempting this one.