Rhythm of War (in-world)

Rhythm of War is the name Navani and Raboniel chose to give the shared notebook they maintained, while experimenting with the different Lights of Roshar. It was symbolically named after the Rhythm of War to represent Honor and Odium working together, if only for a short time. Raboniel had a copy of this book made for Navani, while the original was sent to Kholinar, as she wanted the discoveries made by them to give both sides the tools to finally end the war. 
The Fused scholar of human art forms, El, later uses the original notebook to replicate their work, and kills Lezian permanently to test it out.
== Full Pages ==
Page	Transcription
 	The Thaylen Vacuum Tube
Navani: A cracked diamond affixed to the end might give the exact result I am seeking.
Navani: The metal caps unscrew for versatility in experimentation. 
Navani: A fabrial pump removes the remaining air. 
Navani: The rhythms cause patterns in the sand, different patterns for the different kinds of light. There must be an answer of some kind here, though I wish I could consult a true scholar concerning this.
Undertext (Raboniel): Now that we have seen where this line of exploration has led, I am amazed that you were able to extrapolate this, Voice of Lights.
Navani: The tones are becoming easier for me to hear. I recognize the tones of the different kinds of light and struggle to hear if there is something more.
Undertext (Raboniel): Your research has yielded great fruits. There was a time I thought it impossible for one of your kind to hear the rhythms. How could I have anticipated the magnitude of what you have kept hidden from me? I fear I have underestimated you and your kind.
 	Raboniel's Soul-harvesting Dagger
Navani: The white gold metal vein down the middle conducts Investiture. Raboniel calls the metal raysium and says there is not enough in this dagger to collect her soul or that of a Herald. I am not sure I believe her.
Undertext (Raboniel): Navani is right not to believe. I have given her few reasons to trust me, after all, but in this thing I do not lie. Why give into my enemy's hands the means to destroy me?
Navani: I will proceed with my experiments. Our discovery of Warlight, paired with my eventual understanding of this dagger might yield a way to stop this war.
Undertext (Raboniel): Though I think we disagree on what an acceptable end to the war actually looks like.
Navani: The ruby is housed in a metal other than raysium; silver, maybe?
Undertext (Raboniel): I can confirm: the metal is not raysium but a silver-nickel alloy and does not affect the dagger's function.
Navani: I suspect the vein of raysium continues through the dagger's hilt and somehow attaches to the ruby at its base.
Undertext (Raboniel): The raysium vein is removable, reversible, and conducts Investiture directly to the gemstone.
Navani: Touching the dagger to half of the ruby does not pull out the half spren. Cracking one half, however, allows the spren to escape. The dagger immediately pulls the spren along the raysium vein and into the gem at its base.
== Excerpts ==
=== From page 1 ===
=== From page 3 ===
=== From page 5 ===
=== From page 6 ===
=== From page 10 ===
=== From page 13 ===
=== From page 21 ===
=== From page 27 ===
=== From the final page ===
=== From the first coda ===
== Trivia ==
*Rhythm of War is the namesake of the fourth book in The Stormlight Archive series, following with the trend of naming them for in-world books.
*The text of the first coda is from the epigraphs of Day Eight of Wind and Truth.
== Notes ==