I can't recommend this book highly enough. This is the definitive reference manual for the Catholic faith. Excellent references are made to both the Sacred Scripture as well as church fathers, popes and councils.
During my spiritual journey to find a home, I came to rely on this excellent compendium of solid catholic theology during a time when I found most clergy and laity unsure of what it was they did believe -- or believed anything they wanted, despite centuries of belief to the contrary. As a resource document, it is without parallel after the Documents of Vatican II.
The documents of Vatican II are a clearer, wider, and more spiritual exposition of what the Church today believes. But sometimes, with so many mixed messages from pulpit and revisionists, the Documents of Vatican II can present difficulties to those uncertain of core beliefs.
That's where this book comes in. This book is systematic theology at its best. It posits the dogmas of the Church in a clear and unequivocal manner, and then goes about supplying the historical foundations for these dogmas. These foundations include ecumenical councils as well as writings of the saints. If a certain proposition is "de fide," it is of unquestioned belief. But there are other propositions that are not "de fide," that are provided to sharpen the core deposit from speculative ideas.
I refer to this book often when I come across propositions I find either doubtful or equivocal. Not only does it provide the clear and unadulterated truths of the catholic faith, but it provides the raison d'etre for those truths, making it a wealth of clear exposition of why catholics believe what they believe.