This book is a philosophical essay that explores the concept of absurdity, and how individuals should respond to life's inherent meaninglessness. It posits that life is essentially absurd due to the conflict between our desire for understanding and the chaotic, indifferent universe. The author argues that the only proper response to this absurdity is to live life to its fullest, embracing and rebelling against the absurdity, rather than resorting to suicide or turning to religion or philosophy for false comfort. The story of Sisyphus, condemned to eternally roll a boulder up a hill only for it to roll back down, is used as a metaphor for the human condition.

The book is a philosophical work that presents the core tenets of existentialist thought, emphasizing the individual's unique position as a self-determining agent responsible for the authenticity of their choices and actions. It argues that human existence precedes essence, meaning that people first exist without predetermined purpose and must then define themselves through their decisions and commitments. The text also addresses the implications of this freedom, including the weight of responsibility it places on individuals and the consequent anxiety, as well as the absence of a universal moral code. It concludes with a discussion on the role of human solidarity and the ethical considerations that arise from our interconnectedness with others.

"Sense and Non-Sense" explores the complex relationship between perception, art, language, and philosophy. The book delves into how human experience and understanding are shaped by our sensory perceptions, which are intertwined with our cultural and linguistic contexts. Through a series of essays, the author critiques and builds upon the ideas of existentialism and phenomenology, arguing that meaning in life is created through our interactions with the world around us. The work challenges traditional notions of objective reality, emphasizing instead the subjective nature of human experience and the inherent ambiguity and uncertainty of existence.