Hodder's Theory of Knowledge, 4th edition, boldly enters a new universe of TOK education. Reflecting IB's total revamp of the TOK curriculum, this text takes "what do we know and how do we know it?" to a new level. Henly, co-author of the 3rd Edition, and Sprague, both esteemed TOK experts, have masterfully created both a course guide and a resource textbook for teachers and students alike. Veteran TOK teachers may find the TOK curriculum changes disconcerting - the exclusion of the ways of knowing as a central part of the curriculum, for example - but armed with this text, they and their students may navigate new perspectives with confidence.Illustrations provide visual relief to pages dense with text. Many of the illustrations have captions that pose questions, making the pages more interactive. As well, words that might be unfamiliar to students are highlighted in the text and defined in the margin. This inclusion ensures that students don't get lost in the text by bypassing unfamiliar words. Finally, the writing is both enjoyable and practical. Examples demonstrate an obvious sense of humor, from the first anecdote of getting eaten by a tiger to later examples of "bats, banana slugs and Bengal tigers" and hairy hobbit feet, making the reading engaging to young people. This sometimes playful use of real-life examples models for students how claims should be supported with original evidence for the Prescribed Title Essay, again effectively integrating course content with practical assistance.