Book excerpt: In this book, Michael Blome-Tillmann offers a critical overview of the current debate on the semantics of knowledge attributions. The book is divided into five parts. Part 1 introduces the reader to the literature on 'knowledge' attributions by outlining the historical roots of the debate and providing an in-depth discussion of epistemic contextualism. After examining the advantages and disadvantages of the view, Part 2 offers a detailed investigation of epistemic impurism (or pragmatic encroachment views), while Part 3 is devoted to a careful examination of epistemic relativism and Part 4 to two different types of strict invariantism (psychological and pragmatic). The final part of the book explores Presuppositional Epistemic Contextualism - a version of contextualism that is argued to provide a more powerful and elegant account of the semantics of 'knowledge' attributions than many of its competitors. A clear and precise account is provided of the main principles underlying each view and of how they aim to explain the pertinent data and resolve philosophical puzzles and challenges. The book also provides charts outlining the relations between the positions discussed and offers suggestions for further reading.