A number of other texts including a Liber de speculis and a Compositum astrolabii are spurious ascriptions. Historical fiction The book "Eresia Pura", by Adriano Petta is a fiction, in italian, based on historical research, around the life of Jordanus de Nemore. Editions of Jordanus’ works Most of Jordanus' works have been published in critical editions in the twentieth century. 1. Mechanics: The three main treatises and the “Aliud commentum” version (Latin and English) are published in The Medieval Science of Weights, ed. Ernest A. Moody and Marshall Clagett (Madison: University of Wisconsin Press, 1952). The commentaries are also found in Joseph E. Brown, “The ‘Scientia de ponderibus’ in the Later Middle Ages,” PhD. Dissertation, University of Wisconsin, 1967. The Liber de ponderibus and the “Aliud commentum” version were published by Petrus Apianus (= Peter Bienewitz) in Nuremberg, 1533; and the De ratione ponderis was published by Nicolò Tartaglia in Venice, 1565. 2. The Algorismi treatises: The articles by Gustaf Eneström, which contain the Latin text of the introductions, definitions and propositions, but only some of the proofs, were published in Biblioteca Mathematica, ser 3, vol. 7 (1906–07), 24-37; 8 (1907–08), 135-153; 13 (1912–13), 289-332; 14 (1913–14) 41-54 and 99-149. 3. Arithmetic (the De elementis arithmetice artis): Jacques Lefèvre d’Étaples (1455–1536) published a version (with his own demonstrations and comments) in Paris in 1496; this was reprinted Paris, 1514. The modern edition is: H. L. L. Busard, Jordanus de Nemore, De elementis arithmetice artis. A Medieval Treatise on Number Theory (Stuttgart: Franz Steiner Verlag, 1991), 2 parts. 4. Algebra (De numeris data): The text was published in the 19th century, but a critical edition now exists: Jordanus de Nemore, De numeris datis, ed. Barnabas B. Hughes (Berkeley: University of California Press, 1981). 5. Geometry: "De triangulis" was first published by M.Curtze in "Mittheilungen des Copernicusvereins für Wissenschaft und Kunst" Heft VI - Thorn, 1887. See in Kujawsko-Pomorska Digital Library: http://kpbc.umk.pl/dlibra/docmetadata?id=39881. More recently, the Liber philotegni Iordani and the Liber de triangulis Iordani have been critically edited and translated in: Marshall Clagett, Archimedes in the Middle Ages (Philadelphia: American Philosophical Society, 1984), 5: 196-293 and 346-477, which is much improved over Curtze's edition. 6. Stereographic projection: The text of version 3 of the Demonstratio de plana spera and the introduction were published in the sixteenth century – Basel, 1536 and Venice, 1558. All versions are edited and translated in: Ron B.