I just got done re-reading the eleventh book of the *Wheel of Time* series: *Knife of Dreams*. However, throughout the book there weren't any significant references that I caught to knives or dreams. In fact, *Tel'aran'rhiod* did not seem to play a significant role in the plot, for the most part, aside from allowing Egwene to communicate with the rebel hall after her capture. I don't even remember a single instance of Perrin entering the dream world.

Thinking back on the series, I thought the title might have something to do with dream spikes, but they don't seem to have been introduced yet, either. What does the title refer to? What is its meaning?