The book is a satirical self-help guide that explores the human condition and our place in the universe through a series of thought experiments, quizzes, and essays. It delves into topics such as existentialism, semiotics, philosophy, science, and religion, all with a humorous twist. The book challenges readers to examine their lives, their beliefs, and their perceptions of reality, ultimately suggesting that we are all a little lost in the cosmos.

In "Why Does The World Exist? An Existential Detective Story," Jim Holt explores the question of why there is something rather than nothing. He interviews philosophers, scientists, and theologians to try to find an answer, delving into topics such as the nature of existence, the origins of the universe, and the meaning of life. Along the way, he examines various theories and arguments, from the Big Bang to the concept of God, in an attempt to uncover the ultimate explanation for the existence of the world.