January 28 is the Memorial of St. Thomas Aquinas. Here are some resources and links that can help you understand why St. Thomas is a Doctor of the Church and the patron of schools, universities, students and book sellers.

Seeds of Faith St. Thomas Aquinas from Novalis. St. Thomas Aquinas on creation.

Thomistica  is a website devoted to the academic study of St. Thomas Aquinas (a.d. 1225-1274), the medieval Italian theologian of the Order of Friars Preachers (Dominicans). This site is designed to provide ready access to up-to-date information about resources for scholars of Aquinas, via constantly-updated news and commentary pages. (from their website)

St. Thomas Aquinas in English provides a thorough Bibliography of works by and about St. Thomas. It has links to primary source documents. See also the Christian Classics Ethereal Library

GK Chesterton’s biography of St. Thomas as a pdf from Project Gutenberg.

Stanford Encyclopedia of Philosophy St. Thomas Aquinas

American Catholic’s Saint of the Day St. Thomas Aquinas

St. Thomas Aquinas Prayer for Scholars from Patheos

Works by Thomas Aquinas at LibriVox (public domain audiobooks)