hi, rates and royalties is always hard...

I almost never ask for royalties, as I like to do something and get it finished without having to check on royalties afterwards (but if you think the book is going to be a bestseller, it may be another story .

As for rates, it all depends on how much time (size, style, color?) you'll need and what you think is a decent payment. You can also check the mapmaking-request forum thread history to see what others proposed as a budget for maps...

And, of course, it also depends on what the publisher wants to pay for it. You can propose the rate you think is decent, or if you're unsure, you can ask what his/her budget is. If it's too low for you, you can work out something with royalties if you want the job.

Also you can check what usage-rights he/she want, if it's full copyright it can be more expensive then when it's (exclusive) usage-rights for the book...

... anyway, just my thoughts on this.... cheers, DJ