St. Thomas Aquinas’ Summa Theologiae, with the full text in parallel Latin and English columns.  The full set is eight hardcover volumes with sewn bindings -- two each for the Prima, Prima Secundae, Secunda Secundae, and Tertia. 

• Elegant and readable typeface
• User-friendly layout
• The best base texts available, in Latin and in English, reviewed for accuracy by a team of scholars
• Thick paper, suitable for writing notes on
• Strong hardcover binding
• Affordable pricing