Returning to Italy, he made an attempt to teach in Genoa but was driven again to France, where he tried to clear himself of suspicion by publishing a book against atheism: "Amphitheatrum Aeternae Providentiae Divino-Magicum" (1615). Though the definitions of God are somewhat pantheistic, the book served its immediate purpose. Although Vanini did not expound his true views in his first book, he did in his second: "De Admirandis Naturae Reginae Deaeque Mortalium Arcanis" (Paris, 1616). This was originally certified by two doctors of the Sorbonne, but was later re-examined and condemned.