It is a detailed study of the main elements of a scenario. And one of the great achievements of this book is that it is not a heavy theoretical treatise. It is rather a demanding manual but the scope of everyone. It is also a complete, practical and fascinating on how best to move from idea to the structure of the script, not mechanically, but organic, alive. Truby makes much of the idea that cinema is not only a show but also a moral debate. In short, a solid base for those wishing to venture to the writing of a particular scenario of history in general ..