The Summa Illuminated – Guide to St. Thomas Aquinas's Summa Theologica

"This book is the ordinary reader's clearest introduction to the Summa Theologica. It illuminates the obscure and enlivens the dispassionate arguments of St. Thomas Aquinas. Everyone should be reading St. Thomas, and I can't imagine a better guide than Fr. Cajetan Cuddy." —Scott Hahn

The Summa Illuminated offers an accessible, expertly guided tour of one of the greatest theological works ever written: the Summa Theologica of St. Thomas Aquinas (c. 1225–1274). Written by Fr. Cajetan Cuddy, OP, a premier Thomistic scholar, this book carefully maps the Summa's three-part structure, explains its foundational concepts, and clarifies the terminology Aquinas presupposed his readers to know. Whether you are a lifelong Catholic deepening your faith or a curious newcomer to the Catholic intellectual tradition, The Summa Illuminated gives you the confidence and context to engage Aquinas's masterpiece on your own.

Why You'll Love It

• Written by Fr. Cajetan Cuddy, OP—one of today's foremost experts on Aquinas and Thomistic philosophy
• Endorsed by Scott Hahn as the clearest introduction to the Summa Theologica for ordinary readers
• Demystifies complex scholastic language and arguments without dumbing them down
• Follows the Summa's own structure so you always know where you are in Aquinas's grand vision
• Builds genuine confidence to read and understand the Summa Theologica independently

Product Details

• Author: Fr. Cajetan Cuddy, OP
• Publisher: Ave Maria Press
• ISBN: 9781646803934
• Format: Paperback
• Price: $22.99
• Topics Covered: God & Creation (Part I) · Law, Grace & Virtues (Part II) · Jesus Christ & the Sacraments (Part III)

Perfect For

• Catholics seeking a deeper understanding of Thomistic theology and philosophy
• RCIA participants, confirmation candidates, and adult faith formation groups
• Seminary students and theology teachers looking for a reliable classroom companion
• Book clubs, parish study groups, and Catholic school curricula
• Anyone inspired by Scott Hahn, Bishop Barron, or the New Evangelization movement
• Gift-giving for graduations, ordinations, confirmations, and Catholic feast days

Why Shop Reger’s

• Family-owned Catholic business serving generations
• Carefully curated devotional gifts
• Fast, reliable shipping
• Friendly, knowledgeable customer service

Stocked items usually ship within 1 business day. Special-order and manufacturer-shipped items may have separate lead times; check the product details. Transit time depends on your location and shipping service. Shipping rates are calculated at checkout.

Once your order ships, you'll receive a tracking email with your shipment details. Questions? Contact us at accounts@regers.com.

We accept returns within 30 days of delivery. Items must be unused, in original condition, with tags and original packaging. Custom/personalized items, sale items, certain candle orders and gift cards are non-returnable.

To start a return, email us at accounts@regers.com. Once your return is received and approved, a refund will be issued to your original payment method.