This book contains 2 short titles that all relate to philosophical and theoretical ideas. They are the following books:

Title 1: Skepticism is a philosophical movement that has been in existence for centuries. And even though some may call it old and outdated, studying this concept can bring enlightenment to the soul. Sometimes, being skeptical is erroneously connected to simply being negative. But this assumption is far from the truth.

Title 2: Existentialism is a basic terminology concept for theorists that think of the nature of the human condition as a fundamental essence of philosophical issues and who also share the view that this problem is best resolved through ontology. This very broad definition will be clarified by going over seven crucial themes that existentialist thinkers address.