Critical thinking is now needed more than ever. This accessible and engaging book provides the necessary tools to question and challenge the discourse that surrounds us --- whether in the media, the classroom, or everyday conversation. Additionally, it offers readers a deeper understanding of the foundations of analytical thought. Informal Logical Fallacies: A Brief Guide is a systematic and concise introduction to more than forty fallacies, from anthropomorphism and argumentum ad baculum, to reductionism and the slippery slope argument. With helpful definitions, relevant examples, and thought-provoking exercises, the author guides the reader through the realms of fallacious reasoning and deceptive rhetoric. This is an essential guide to philosophical reflection and clear thinking.