This book seeks to examine the mutual interplay between existentialism and Christian belief as seen through the work of three existentialist thinkers who were also committed Christians - a Spaniard (Miguel de Unamuno), a Russian (Nikolai Berdyaev), and a Frenchman (Gabriel Marcel). They are compared with each other and with leading non-religious existentialists. The major themes studied include reason, freedom, the self, belief, hope, love, suffering, and immortality. Alex Longhurst, before retiring and writing this book, was previously a Professor at Leeds University. He is the author of ten previous books/editions and more than 100 journal articles and essays.