Orthodoxy by G. K. Chesterton is a classic of Christian apologetics. Chesterton considered Orthodoxy a companion to Heretics. In the book's preface Chesterton states the purpose is to "attempt an explanation, not of whether the Christian faith can be believed, but of how he personally has come to believe it. Chesterton presents an original view of Christian religion seeing it as the answer to natural human needs, the "answer to a riddle" and not simply as an arbitrary truth received from somewhere outside the boundaries of human experience. Gilbert Keith Chesterton was an English prolific and diverse writer whose subjects include philosophy, ontology, poetry, playwriting, Christian apologetics, and fiction, including detective fiction. Chesterton is well known for his reasoned apologetics, as a political thinker and orthodox Christian.