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pauly
Good suggestion. I occasionally came across this edition recently and basically I can say that it reinforces my thoughts about derivatives books. Some of them explain the concepts clearly (like for example Options, Futures an Other derivatives by Hull) and concentrates on less math, while others like McDonalds derivatives which I learned concentrates mainly on mathematical modeling while giving less(and in some cases not enough explanation of the concept being discussed). Wilmott on the other hand blends both of the techniques and explains in detail what he finds to be interesting and important while (I can provide many topics) some of the concepts are just reviewed quickly.
If you decide to get the McDonalds Derivatives Markets, write me in conversation and I'll help you get the written in-detail explanation (by professors at various universities) of the concepts which are covered in this book and also on the above books mentioned.