Treatise on Armor Optimization (Increase Damage Reduction) - 40 % increase to worn Damage Reduction
Manual of Triggered Casting (Increase item proc rates) - 10 % increased chance to proc
Zaela is correct. It increases the effectiveness of what you have, past cap if need be, without actually adjusting the cap. IE it only counts the points up to cap, and multiplies that, still ignoring over cap.
As for procs, your question doesn't make sense... both of them clearly state they are percent bonuses, so order can't matter (base * item_adept * proc_tome == base * proc_tome * item_adept).
I went and cleaned up the language some, so it should be much clearer.
Fury of Light This ability allows you to engulf a foe with the concentrated Fury of the Light, binding them and slowing their attacks as well as decreasing their avoidance.