I recently finished Temptation of St. Anthony by Gustave Flaubert and I thought it was really amazing. Anthony is tempted by a series of figures who exhaust the potentials of corporeal life, then those who exhaust the potential of spiritual life, all the while clinging to his One true God. Finally he enters into dialogue with Satan himself... You can get it for free on Gutenberg and it's a pretty short read:
Tentation de saint Antoine. English by Gustave Flaubert - Project Gutenberg