Venus on the Half-Shell assumed that Vonnegut wrote the book. This problem was solved by the book being reprinted under Farmer's by-line. A common element to this novel is the origin of many of the characters' and locations' names. Farmer "put in a lot of references to literature and fictional authors... Most of the alien names in Venus were formed by transposing the letters of English or non-English words." The title and paperback cover art are a reference to an Italian Renaissance tempera painting by Sandro Botticelli, "The Birth of Venus", which depicts the birth of the goddess Venus as her rising from the
Sandro Botticelli Pollaiuolo and others, although views on this differ. A Botticello who was probably Sandro's brother Giovanni was close to Lorenzo. Although the patrons of many works not for churches remain unclear, Botticelli seems to have been used more by Lorenzo il Magnifico's two young cousins, his younger brother Giuliano, and other families allied to the Medici. Tommaso Soderini, a close ally of Lorenzo, obtained the commission for the figure of "Fortitude" of 1470 which is Botticelli's earliest securely dated painting, completing a series of the "Seven Virtues" left unfinished by Piero Pollaiuolo. Possibly they had been introduced by a Vespucci