I didn't care for the Shadow books, particularly the first. To me he lessened the Ender character to promote Bean in the new book. And as I love the Ender character, it didn't sit well with me, really. I probably would have preferred it starting with the return to earth and the Hegemon struggles.
Andy on OSC in general, he has some good stuff out there, and can flip between science fiction and fantasy with ease. He's mormon, and a few of his things are allegories for teh book of mormon, which I find he does a bit heavy handed