With this book we try to reach several more-or-less unattainable goals namely: To compromise in a single book all the most important achievements of Monte Carlo calculations for solving neutron and photon transport problems. To present a book which discusses the same topics in the three levels known from the literature and gives us useful information for both beginners and experienced readers. It lists both well-established old techniques and also newest findings.

I. Lux

1. Scope of The Book 2. Introduction 3. Direct Simulation of The Physical Processes 4. Collision Density and Importance Equations and Their Solution 5. Moment Equation 6. Special Games 7. Optimization of Efficiency-Increasing Techniques.