Redeemer library possess an (almost) complete set of Aquinas's Summa Theologiae. See below for links.
NB: Combined: volumes 45 and 46 are the only volumes Redeemer doesn't have
Summa theologiae: a concise translation
Summa Theologiae: Latin text and English translation, introductions, notes, appendices, and glossaries by 
Discovering Aquinas by Thomas Aquinas is one of the great figures of church history, and his ideas continue to have a powerful effect on theologians and contemporary writers from very different backgrounds and traditions. In Discovering Aquinas Aidan Nichols offers a lively and authoritative introduction to the life, thought, and ongoing influence of this singular churchman. This book could not have come at a better time. After a lengthy period of declining interest in Aquinas, we are starting to see a Thomistic renaissance, including a renewed appreciation for the way Aquinas's work so brilliantly weaves together philosophy, theology, spirituality, revelation, and ethics. As Nichols writes, "It is because of the wonderfully integrated character of the wisdom of Thomas Aquinas -- integrated not only as supernatural with natural but also as thinking with love -- that the church in our day should not leave him as a fresco on a wall but find inspiration from his teaching and example." By means of writing as felicitous as it is insightful, Nichols chronicles the compelling facts of Aquinas's life, explores the major facets of his thought, establishes Aquinas's historical importance, and shows why many today are regarding him as a vital partner in current debates about the future of Christianity.
The Oxford Handbook of Aquinas by Thomas Aquinas (1224/6-1274) lived an active, demanding academic and ecclesiastical life that ended while he was still comparatively young. He nonetheless produced many works, varying in length from a few pages to a few volumes.The present book is an introduction to this influential author and a guide to his thought on almost all the major topics on which he wrote. The book begins with an account of Aquinas's life and works. The next section contains a series of essays that set Aquinas in his intellectual context. Theyfocus on the philosophical sources that are likely to have influenced his thinking, the most prominent of which were certain Greek philosophers (chiefly Aristotle), Latin Christian writers (such as Augustine), and Jewish and Islamic authors (such as Maimonides and Avicenna). The subsequent sectionsof the book address topics that Aquinas himself discussed. These include metaphysics, the existence and nature of God, ethics and action theory, epistemology, philosophy of mind and human nature, the nature of language, and an array of theological topics, including Trinity, Incarnation, sacraments,resurrection, and the problem of evil, among others. These sections include more than thirty contributions on topics central to Aquinas's own worldview. The final sections of the volume address the development of Aquinas's thought and its historical influence.Any attempt to present the views of a philosopher in an earlier historical period that is meant to foster reflection on that thinker's views needs to be both historically faithful and also philosophically engaged. The present book combines both exposition and evaluation insofar as its contributorshave space to engage in both. This Handbook is therefore meant to be useful to someone wanting to learn about Aquinas's philosophy and theology while also looking for help in philosophical interaction with it.
Elements of Christian Philosophy
Aquinas by 
The Philosophy of Aquinas by This new and updated edition of Christopher Shields and Robert Pasnau's The Philosophy of Aquinas introduces the Aquinas' overarching explanatory framework in order to provide the necessary background to his philosophical investigations across a wide range of areas: rational theology, metaphysics, philosophy of human nature, philosophy of mind, and ethical and political theory. Although not intended to provide a comprehensive evaluation of all aspects of Aquinas' far-reaching writings, the volume presents a systematic introduction to the principal areas of his philosophy and attends no less to Aquinas' methods and argumentative strategies than to his ultimate conclusions. The authors have updated the second edition in light of recent scholarship on Aquinas, while streamlining and refining their presentation of the key elements of Aquinas' philosophy.
Thomas Aquinas on Human Nature by 
Thomas Aquinas on the Passions by 
Thomas Aquinas by 
Through the Rearview Mirror by 
Thomas Aquinas's Summa Theologiae C by 
The Cambridge Companion to Aquinas by Peter Turkstra Library, Redeemer University , 777 Garner Road East, Ancaster, ON, L9K 1J4, Canada Circulation Desk Telephone: 905.648.2139 ext. 4266, Email: library@redeemer.ca