Couldn't agree more with A Customer. The style is crisp so that at times you find yourself pausing for half an hour over some line in a proof only to find that it was obvious all along. But that is good. Gets you thinking about copulas. By the end of the book you have a very satisfying intuitive feel for the subject with concepts like the distribution of mass throughout the copula making such heuristic sense. As an actuary working in insurance, this is perfect for my needs.