I started this book knowing almost nothing about Sartre- I had some misconceptions about existentialism and continental philosophy, and I knew the plot of Huis Clos- and that was the extent of my knowledge. Having read this book I now have a grasp of some of the concepts that were important to Sartre's philosophy, like bad faith and authenticity. I was often surprised by how well Sartre's ideas lined up with what I've studied about Buddhism, cognitive science, and the more analytic schools of philosophy. Sometimes I had moments of deeply resonating with Sartre's observations and conclusions. This is an example of a book that delivers exactly what it promises, I feel as though an expert has done a great job explaining to me the fundamentals of Sartre's philosophy.