Blind though he might be, Myr's gotten good at reading moods from what his remaining senses tell him. (And given he's a mage outside the Circles, nervousness is an emotion he's encountered regrettably often even among the Inquisition. He picked that one up fast.)

Not much to be done about it but seem as nonthreatening as it's in him to be. His bright, abrupt smile at the mention of the books might or might not help in that endeavor. "They are? And here I wasn't expecting them for another few days!" Leaving aside what business a blind man might have with books... Haelan's gotten the right mage, at least.

"Right. Or someone can get away from you entirely--if you're caught in a hall or another choke. Between this and glyphs that repel a mage's enemies, you can take control of a battlefield, with a little planning." His enthusiasm for the work is obvious in his voice, even though he's making efforts to temper his tone around someone made uneasy by magic. "And if you're aware of how they interact with each other, it sets up a few other interesting possibilities, too."