6.
Synopses of Book XI - poseidon64.tripod.com/Odyssey.html
Odysseus evokes the spirits of Hades as he reaches the gloomy gates. The first ghost he sees is Elpenor who tells his former captain to go back to Aeaea and give him a proper burial. Teiresias outlines the rest of Odysseus’ life. Anticlea, his mother, tells how she has died, waiting hopelessly for his return. After recalling the ghosts of many famous women, Odysseus interrupts his story, reminds his hosts of the lateness of the hour, elicits further promises of gifts and an escort. At their urging, he goes on to tell of his interview with Agamemnon and Achilles, and of seeing other great heroes.

Synopses of Book XII -
On his return to Aeaea to bury Elpenor, Odysseus gets instructions from Circe on how to handle the problems ahead. He stops his mens ears with wax and is lashed to the mast to get passed the alluring Sirens.
They then make an impossible voyage through the strait of Scylla and Charybdis. They lose six men to Scylla, who has six dog heads, in contrast to losing everyone plus the ship to Charybdis. They land on the isle of the sun god, Helios. Odysseus’ men disregard his warnings and eat the sacred cattle.



This sacrilege was punished by a shipwreck in which all but Odysseus drowned.