 Donat Spiteri is also the author of numerous books of theological and biblical themes, of which "il-Ktieb tas-Salmi" (Book of Psalms), "Dizzjunarju Bibbliku" (Bible Dictionary), "Temi Teologici" (Theological Themes), "l-Evangelji ta' San Mattew u San Luqa" (The Gospels of St. Matthew and St. Luke), "il-Ktieb ta' l-Atti ta' l-Appostli" (The Book of the Acts of the Apostles) and many others are being published by the Malta Bible Society.He also was a regular contributor in articles to the local press and various religious magazines such as "Dawl Frangiskan", besides lecturing and explaining the Holy Bible on the local media.He also toured various parishes in Malta and Gozo where he gave Biblical courses.