His non-fiction works include "Ir-Rivoluzzjoni Franciza: il-Grajja u t-Tifsira" ("The French Revolution: History and Meaning"), "Bonaparti f'Malta" ("Bonaparte in Malta"), of which a French translation, "Bonaparte à Malte", was published in 2008, and "On The Da Vinci Code" (2006), a bilingual (English and Maltese) commentary on the international bestseller. He also edited Mikiel Anton Vassalli's "Lexicon". Vassalli (d. 1829) is considered the Father of the Maltese Language. In 2006, Sammut's translation of Vassalli's "Motti, Aforismi e Proverbii Maltesi" was published as "Ghajdun il-Ghaqal, Kliem il-Gherf u Qwiel Maltin". In 2007, his "Il-Holma Maltija" in translation (as "La Malta Revo") represented Malta in the Esperanto collection of classic literary works published by Mondial Books of New York. In 2008, his "Il-Gagga" was published for the fifth time. In 2009, Sammut presented a revolutionary reinterpretation of Pietru Caxaro's poem "Xidew il-qada" (also known as "Il Cantilena"), the oldest written document in the Maltese language.