The human mind has the curious, even mysterious, ability to generate thoughts about things with which we are not in causal contact, such as when we think about yesterday’s tennis final, or Aristotle, or unicorns. Naturalizing mental content has usually meant explaining how this is possible in terms that eliminate the mystery while retaining commitment to a substantive relationship between mind and world that undergirds this ability. In Deflating Mental Representation (MIT Press), Frances Egan argues that we should give up this commitment in favor of a naturalistic account that treats attributions of content as abstract glosses of neural mechanisms. According to Egan, who is emeritus professor of philosophy at Rutgers University—New Brunswick, representational glosses play ineliminable roles in commonsense psychology and our explanations of human behavior, but they should not be taken literally. Egan forcefully challenges many leading theories of mental representation, making her book a must-read for those interested in the concept of mental representation in the cognitive sciences. Deflating Mental Representation is available open-access and free here.