Book excerpt: Clear writing and analysis of the broad spectrum of processes that produce shale are coupled with well-captioned 150 illustrations, 40 tables, boxed technical details, glossary and appendices. Recounts the step-by-step evolution and stages of shal, enabling readers to master the basics and to dig yet deeper into their origin, practical implications and relationship to earth history. Background information appears in appendices (Clay Mineralogy, Isotopes, Petrology, etc.); technicial details in high-lighted boxes, and definitions of 300+ terms in the Glossary.