12mo, pp. , 1028, ; collating: ):(8 2):(8 A-3X8 3Y6; printer's device on title is that of Christophorus Corvinus; contemporary full calf, blindstamped lozenge within a triple-ruled border on covers, silk ties mostly perished, edges stained red, endpapers are printers' waste; a very good copy. Originally published in 1600 with title Sphinx philosophica, this is a book of Latin riddles, aphorisms, and apothegms by the German scholar Johann Heidfeld (d. 1623). The book is divided into sections such as "Of God," "Of Time," "Of Honor & Infamy," "Of the Liberal Arts," and many others. Writing in responsorial style, Heidfeld answers the questions he poses from various sources, classical and contemporary.