This is a really fun book, and it might be my favorite of the American Girl birthday books. It has a strong plot and satisfying character arc, introduces lots of new elements to the story, and brings in the incredibly vivid, memorable character of Aunt Millie. I could never forget her country background and penny-pinching ways, but I didn't fully realize how much fun it was going to be to read this book again through the lens of modern movements. Aunt Millie is the ultimate zero waste queen!
One thing that I didn't remember is that Aunt Millie was not a biological relative. I thought that she was Kit's dad's aunt, but she was actually his adoptive mother, because when his parents died, she and her husband took him in. I didn't remember that at all, and was extremely interested in this backstory tidbit now, especially because of the contrast between his upbringing as an orphan in a poor coal-mining town in Kentucky and his wife's status as a society lady in Cincinnati. How did they end up together? When did they meet? It's such an interesting potential story, but alas, I will never know the details, unless I decide to write fan fiction about it.
That's such a testament to the quality of the American Girl books, though. Usually, childhood favorites lose some of their luster when you reread them in adulthood, but I'm just like, "Wait. In addition to this being great, I want MORE. I want the backstory about all the adults!" This series is so well-crafted, with so many colorful and memorable characters, and they all seem like real people. The parents and other grown-ups aren't just stock characters that fulfill roles, but could be the subjects of their own novels.
Also, Grace is a fabulous fictional dog. Dogs, like small children, are often presented as being Extremely Cute and So Funny in fiction, but then rarely are. The characterization of Grace is appealing, realistic, and hilarious, and she truly becomes part of the family. I love the different details related to the pet adoption, and Grace is probably my favorite fictional dog, along with Hound from the Jeanne Birdsall Penderwicks series.