We all like to think we're making decisions based on reality, but in fact, we're almost always working from incomplete information. And when 'you don't know what you don't know', it can be impossible to navigate successfully. In You Don't Know What You're Missing mathematician Kit Yates explores the blind spots, gaps in our knowledge and how we make sense of the world given we usually have an unfinished picture. From avoiding common traps and pitfalls to filling in the gaps without guessing, it shows us how to turn our misses into hits.