Gregory Bassham is formerly Professor of Philosophy at King's College (Pennsylvania). He is the author, co-author, or editor of eleven books, including Environmental Ethics: The Central Issues (2021), The Bedside Book of Philosophy (2021), Critical Thinking: A Student's Introduction (6th ed. 2019), The Philosophy Book: 250 Milestones in the History of Philosophy (2016), and The Ultimate Harry Potter and Philosophy (2010).