It didn't seem right to give this book 4 stars, being a cartoon format survey of a major philosopher, so I gave it only three stars. But it did do a very good job of explaining Sartre's philosophy(ies) in simple, understandable language. I have always had a bent toward existentialism and tried to read some Sartre over the years, but aside from his plays ("No Exit" and "The Flies") I found his work too ponderous ("Being and Nothingness" and "Search for a Method"). So when I saw this book on the library shelves, I figured why not give it a try.
It was a good decision. I know Sartre talked about freedom and choice and radical conversion, emptiness, existence precedes essence, "hell is other people," objectification of others. I had a reasonable sense of what I thought he meant with these concepts. I also previously had a vague idea of concepts such as Being-for-Itself, Being-in-Itself, Bad Faith, reflective and unreflective consciousness, and other more obscure, tongue-twisting terms. Not only did this book clarify those concepts for me, it also gave me a much better understanding how they tie together to form a whole, and how the concepts relate to Descartes, Plato, and Kierkegaard. (Given the context provided by the author, I even thought I understood "A freedom-which-wills-itself freedom is in fact a being-which-is-not-what-it-is and which-is-what-it-is-not, and which chooses as the ideal of being, being-what-it-is-not and not-being-what-it-is" as I read it - though my understanding may have been an example of "really-really-bad-faith" .)
I know I was never going to read "Being and Nothingness," and probably not even a book-length summary of Sartre or his philosophy. This book was a good compromise. It gave me what I wanted - a basic understanding of Sartre's philosophy, in a relatively easy package. Anything more than that wasn't in the cards. On those grounds I considered giving the book 4 stars.