Reinert
"Thank you, Grit, for the dagger. If I had a similar item that would show you as a friend of the Dwarves, I would give it to you. But here, take my dagger, at least, in return. And my friend here, " he indicates Cattivo, and continues, as before, speaking in Goblin, "he's a bit of a orc's bladder, but he's actually quite a talented musician. I'll ask him to compose a verse about you and your kin which may improve your reputation around here."
Reinert shifts to common. "I think we should leave with Kyla. It would be asking too much for her to remain any longer. I think it unlikely we would be able to surprise Richard, anyway, since he can turn invisible. Can you confirm that it is a spellbook, though, Kaltide?"
"Kyla, perhaps Richard was corrupted in some way by this book or other items. Is there a place in the house or the viscinity where he might keep things hidden?"
OOC: Reinert would want to use his sense motive skill on Grit, to try to guage his true intentions.