This book was providencial during my Master in Statistics research. It is THE reference when it comes to discrete distributions, a topic in Stats which has bloomed in the last two decades. This new edition covers some state-of-the-art topics in the field, such as mixture distributions and new families of discrete random variables. It is well written, but never verbose: it cuts to the chase and will be of great help to a practitioner in dire need of an arcane test. And finally, believe it or not, discrete random variables are FUN. The more you know about them, the more you perceive they can be applied in almost any practical situation. And you don't need much more than the contents of this book to be an expert.