[mesmark]

I have a friend who writes ESL materials. I'll ask him, but I assume you'll just get paid for your time (hours spent.) You're not writing the whole book so getting royalties is really out of the question.

Whatever you do get, make sure your name is on/in the book. That way if you are looking for Uni. work in the near future you'll have one (or one more) published work.

Anyway, I'll ask my friend.