Having worked combining literary works and Environmental Psychology, we have proposed that in some novels most of the assumptions of environmental psychology are present. In order to not generalize this affirmation to all literary works, we have created two criteria: 1. People-Environment Inter-relation - that is, the romance's story should hold a great emphasis in the relation between people and environment - the environment must interlace the human(s) character's story at all times. 2. Environment as a character (Central Axis) - the environment must pose such importance to the storyline that it can also actually be considered a character of the romance. The environment must be as a central axis to the story. Once those two criteria are met, one must then select essential fragments of the book that indicate the people-environment inter-relation. After the selection is made, they are analyzed from a phenomenological approach. For this work, we propose that The Little Prince’s story, as it is filled with metaphors and specific worlds and its individuals, holds a rich people-environment relation to be studied under the lenses of environmental psychology. “It’s a question of discipline (…). When you’ve finished your own toilet in the morning, then it is time to attend to the toilet of your planet, just so, with the greatest care” (p.20). Through constantly comparing inhabitants to the place they relate to, Saint-Exupéry’s book brings attention to the place identity present in people-environment relations. As narrating each planet as an individual’s own house, the book sheds light in the appropriation of spaces and the sense of territory, as well as the environmental qualities present in all individuals. The book, and its many characters observed by the little prince’s naïve eyes, bring to the reader [also an observer] the idea that ‘you are your planet’ and that ‘your planet is you’ – through this sense, this work proposes to bring attention to the environmental psychology matters present in literary works. From the diversities of buildings and landscapes, and the different relations towards them, The Little Prince questions how our interactions with our spaces (natural or built) affect our quality of life. A lesson we are still trying to learn in the real world.