You have my drink, I take it?
Now that's what I call orange juice! Eastern oranges have a bitter kick that truly invigorates the soul!
Ahem! All that jumping around almost made it go down the wrong way. Anyway, before we begin, I have a confession to make.
To be perfectly frank, my expensive tastes in orange juice have to be paid for somehow. While my intentions are sincere, my reasons for helping you are not entirely altruistic.
Pass this letter to Goberin the merchant, and he'll allow you to browse his glamour prism recipe tomes. If you buy any of them, he'll give me a cut of the profits. You'll have the knowledge you seek, and I'll have money for orange juice. What could be more piquant?
I will also send word to my associate Wiscard in Revenant's Toll. We have a similar arrangement, and I'm sure you'll find his prices just as fair as Goberin's.
You should start with Goberin though, since his stall's right there, by the Pissed Peiste. Once you've read one of those books, you'll be able to make the prisms yourself and share the glory of glamours with the masses!
Goberin is very particular about accepting new customers. But once he sees that you have my personal recommendation, he is sure to welcome you with open arms!