The existentialist philosopher Jean-Paul Sartre once declared “the ideal limit of aquatic sports . . . is waterskiing.” The avid surfer and lavishly credentialed academic philosopher Aaron James vigorously disagrees, and in Surfing with Sartre he intends to expound the thinking surfer’s view of the matter, in the process elucidating such philosophical categories as freedom, being, phenomenology, morality, epistemology, and even the emerging values of what he terms “leisure capitalism.” In developing his unique surfer-philosophica…