Ilium

From the author of the Hyperion Cantos -- one of the most acclaimed popular series in contemporary science fiction -- comes a powerful epic of high-tech gods, human heroes, total war, and the extraordinary transcendence of ordinary beings. The first book in a two-part epic. "I am in awe of Dan Simmons." -- Stephen King. From the towering heights of Olympos Mons on Mars, the mighty Zeus and his immortal family of gods, goddesses, and demigods look down upon a momentous battle, observing -- and often influencing -- the legendary exploits of Paris, Achilles, Hector, Odysseus, and the clashing armies of Greece and Troy. Thomas Hockenberry, former twenty-first-century professor and Iliad scholar, watches as well. It is Hockenberry's duty to observe and report on the Trojan War's progress to the so-called deities who saw fit to return him from the dead. But the muse he serves has a new assignment for the wary scholic, one dictated by Aphrodite herself. With the help of fortieth-century technology, Hockenberry is to infiltrate Olympos, spy on its divine inhabitants ... and ultimately destroy Aphrodite's sister and rival, the goddess Pallas Athena.

Synopsis from Open Library.