This book earns its fourth star by virtue of addressing Asperger's syndrome in girls, which occurs much less often than in boys. Any time somebody writes a book that consciously expands the range of people who can see themselves reflected in tween/teen lit, I'm very happy.
Rose loves homonyms, her Uncle Weldon, and her dog, Rain. She loves her dad, too, but it's an uneasy, uncertain kind of love. For one thing, he doesn't have a lot of patience for Rose's quirks (which, besides homonyms, include prime numbers and the importance of keeping rules). The nicest thing her dad's ever done for her is bring home Rain, so named because she was found during a storm. Rose and Rain are pretty much inseparable, except for school. But in a moment's carelessness, Rain is lost in another storm, and Rose's carefully constructed routines are thrown completely out of whack.
Reading this as a grown-up is pretty much designed to break your heart. Thank god for Uncle Weldon, who is kind and patient where Dad is cranky and abrasive, probably because he spends most of his time at the bar. The contrast between the two could come off as cartoon villainish, except that the way that particular conflict resolves itself reveals just what kind of man Rose's dad really is underneath. His character growth is complemented by Rose's: loving and losing her dog not once, but twice, teaches her a lot about empathy, compassion, and being able to understand the way other people see the world.
What makes this novel especially poignant is that Rose and her dad are obviously poor. She keeps her homonym list on paper because they can't afford a computer, and she's stuck in the local public school with minimal classroom support because her Dad can't afford schools that might be more beneficial for her. She's got no IEP, most likely because her dad wouldn't know how to advocate for one; he's not all that open to the help the school DOES offer, implying a typical blue-collar mistrust of middle-class authority. Her clothes, as Uncle Weldon observes at one point, are noticeably shabby, and the kind of food they eat on a regular basis implies a limited budget. It broke my heart, because you know if Rose had been born into a middle or upper class family, it would've been a very different kind of story (albeit still a challenging experience for everybody involved).
So, bittersweet for adult readers, a horizon-broadening pick for most teens. And if you have an Aspie girl in your life, you might want to pick this up for her and see what she thinks.