In case you don't all ready know...most authors don't roll in much. I'm blessed that my fellow authors established a loop where newbie authors like me can ask questions and get great answers from more veteran writers. Royalties seems to be something that comes up every so often.
It sounds like I'll be paid twice a year, and that the second royalty check will have more in it. But no one really knows for sure. There are bunches of factors involved with how much I'll earn, like what month the book released in relation to when the royalties are calculated, if the book made it into the book club (in my case), and how much the publisher holds back in reserves. It's pretty fascinating and a little scary.
Here are some good links.
Agent Rachelle Gardner gets detailed about royalty rates
Author Rebecca Brandewyne on royalties
Sabrina Jeffries' Money Chart
Brenda Hiatt's amazing list of average advances
How much do you hope you'll make someday when you sell your book? If you're a reader only, were you aware how little authors make? Or how much?