This book investigates the nature, validity, and social implications of faith within both religious and secular contexts. Roger Trigg, a philosopher of religion, examines how faith functions as a cognitive and social construct. He analyzes the tension between subjective belief and objective truth claims, providing a framework for understanding how faith operates in modern pluralistic societies.

Readers frequently note the academic density of the prose, which is typical of the Very Short Introduction series. Experts highlight this as a foundational text for beginners seeking a concise philosophical overview of the concept of faith.