Navigating the marketplace of ideas can be difficult when there is so much bullshit to wade through. This book helps connect the underlying arguments used by charlatans and gives readers a skeptic's toolkit to identify the logical traps and pitfalls of different types of nonsense, and to discard each of them using critical thinking practices. From paranormal and medical quackery, to conspiracy theories and religion, the authors unpack the Grand Unified Theory of Bullshit, pulling out the common thread that ties these nonsensical and harmful ideas together.