Graduate Theology

Revised translation: Vatican City: Libreria Editrice Vaticana, 1999.
For print version locations, see the UofT Library Catalogue.
"A statement of the Church's faith and of catholic doctrine, attested to or illumined by Sacred Scripture, the Apostolic Tradition, and the Church's Magisterium. ... a sure norm for teaching the faith." (John Paul II, Fidei depositum).

By Ludwig Ott.
Rockford, IL: Tan, 1974
For print version locations, see the UofT Library Catalogue.
This book is a basic outline of the teachings of the Catholic Church which presents essential statements of doctrine and attempts to explain the foundations of that teaching in Sacred Scripture and Tradition. It is excellent for determining how official a particular teaching is (e.g. de fide or merely the more probable opinion held by most theologians). Since it was published in 1955, it does not include any references to sources from the past sixty years. There is also a more recent English translation by Robert Fastiggi.
The online version is available on the Internet Archive, a trusted source, but one for which it is necessary to create a free account and login.

This is a series of comprehensive introductory handbooks, with essays by leading scholars. It includes works on Biblical studies, Jewish studies, early Christian studies, the Trinity, evangelical theology, feminist theology, theological ethics, Thomas Aquinas, and more.