Tetrads

1. Books 1-4 Telemachus
2. Books 5-8 Odysseus leaves Calypso and reaches the Phaeacians
3. Books 9-12 Odysseus recounts his wanderings to the Phaeacians
4. Books 13-16 Odysseus and Telemachus return to Ithaca; are reunited
5. Books 17-20 Odysseus returns to his palace; Penelope sets contest
6. Books 21-24 Odysseus takes revenge; recovers his rightful place