The second edition of the book appeared in 1995, seven years ago. I browsed through the book and it was not too much out of date. The example codes and pointers to the web have to be checked to be sure that they still work.

There is also some additional material which I could include in the book: course material, lecture notes, articles, case studies etc. There are also other books published during the last seven years which contain some material on optimization. But the amount of time which I can dedicate to the third edition is quite small, a month of work at maximum. Thus I am wondering when I have the time to make the update.