Book excerpt: With the commentary in A Study Companion keyed by paragraph number to the text of An Outline of Esoteric Science, Clopper Almon takes the reader step-by-step through one of Rudolf Steiner's most difficult texts. Each chapter is considered for themes, or brief summaries of the main points, review questions, discussion questions, and Almon's own observations of the text This study companion will be a great help to readers of every level, vastly enriching their reading of one of Steiner's most important written works.