This is a wonderful introduction to the Orthodox faith. I'm surprised it seems to be virtually unknown even among those who are very interested in Orthodoxy. Fr. Bulgakov writes with such force of clarity and manifest love of truth that his bright personality spills from every page; which also serves to make it a smooth read.
Within each topic he is relatively concise, and there are times at which I wished he'd gone into greater detail, but the topics covered are numerous:
Ch. I - The Church
Ch. II - The Church as Tradition
Ch. III - The Hierarchy
Ch. IV - The Unity of the Church
Ch. V - The Sanctity of the Church
Ch. VI - Orthodox Dogma
Ch. VII - The Sacraments
Ch. VIII - The Virgin and the Saints In Orthodoxy
Ch. IX - The Orthodox Church Service
Ch. X - Icons and Their Cult
Ch. XI - Orthodox Mysticism
Ch. XII - Orthodox Ethic
Ch. XIII - Orthodoxy and the State
Ch. XIV - Orthodoxy and Economic Life
Ch. XV - Orthodoxy and Apocalyptic Thought
Ch. XVI - Orthodox Eschatology
Ch. XVII - Orthodoxy and Other Christian Confessions
Ch. XVIII - Conclusion
Of special interest to me is his attitude toward Western Christians. He exhibits a charity that is refreshing as much as it is clarifying. The book is replete with contrasts on certain issues between Orthodoxy and Catholicism (and sometimes Protestantism). He strikes a perfect balance by defending Orthodoxy on all fronts, as he believes it to be the one true Church of Christ, while constantly affirming what is best in each tradition; even to the point of acknowledging God's special gifts to Western Christianity (Catholicism and Protestantism), as unique from Orthodoxy.
This is especially hopeful, as many times Orthodox tend to divide along the line of those completely hostile to the 'heresy of ecumenism' on the one hand, and those who are eager for visible unity even prior to all the proper ado and pontifications and deliberations on the other. Perhaps Fr. Bulgakov offers a vision that has true fidelity to his own faith, while resolving these unfortunate opposites (that often result in vitriol and reactionary thought) and paves a path of charity for genuine dialogue among Christians.