Julian Robertson is a different kind of hedge fund manager than Soros, though they both were the best of their era so this book is an appropriate link.

The Alchemy of Finance gives a much closer look at what George Soros was doing compared with Julian Robertsons book, not to mention it was written by the man himself.

The book also gives a deep overview of Soros' decision making process, and his theory of 'reflexivity', which he claims informs him greatly in his investing process.

Really get to grips with his thinking in his trades.