This is the 2nd edition, which adds 3 new chapters on Design Patterns, some STL customizations, and a very light discussion on scripting.
Like the 1st edition, it should be mandatory reading for all C++ game programmers, but the new chapters don't really add much to justify buying it for owners of the previous book.
I was extremely impressed with this book, it covers a wide range of topics that every Game Programmer should know, but also backs it up with very good examples.