Walter Farrell, O.P., bequeathed to posterity a rich literary legacy, the crown jewel of which is certainly his masterpiece, the four-volume Companion to the Summa.

“Pre-eminent among all the writings which flowed from his gifted pen is his towering four-volume masterpiece The Companion to the Summa, published from 1939 to 1941. It was at once acknowledged a classic in the realm of English theological literature. With this work, Father Farrell, perhaps more than any other, helped to popularize the Summa, he was a pioneer in the teaching of theology to the laity.”