Books 16 and 17
Since Book 16 deals with Patroclus dying, and Book 17 with the fight over his body, I’ve included them together.
“And so they continued to fight, like a blazing fire.
You would not have thought that the sun and moon still existed,
so thick was the darkness that covered all the brave men
who had taken their stand around Patroclus’s body.”
Wonderful notion, “Sleep and Death, those twin brothers.” (16.618)