I've been using this as reference for a CS class on simulation, and it has been a __life_saver__. Some authors just assault you with equations, then wave their hands in the air as an explanation. But here, everything is in plain English. And while the material's not easy, it can be grasped after some close reading. Very trite, but it's made the subject fun. PLUS: Solutions for the exercises are available online with some clever Googling. Check it.