No one can look at the paintings of Hieronymus Bosch without amazement and bewilderment. Professor Gibson shows that what seems inexplicable to us today--the canvases full of torture, monsters, and leering devils--was perfectly intelligible to the fifteenth-century viewer. The subjects of Bosch's paintings were in fact the overwhelming concerns of late medieval Europe: the Last Judgment, original sin, death, temptations of the flesh. The author describes...