Heiress to the Nether (Book 1 of the Error 404 Series)
This story takes place after Hard Pill to Swallow, but before Ender Wish. (As this is first written before Ender Wish's release) Everybody thought Abigail Crysteffor, the Nether Princess, was dead and gone for good. Well, she is. Or rather, was. And then there was Rain, who still mourned for Abigail. When she returns...