No illustrations because this is a young adult book. This novel has less of a "first love" plot than the previous three.
Barbara finds out that her sister Rosemary is getting married after her first year of college. Barbara gets swept up in planning her sister's wedding since Rosemary doesn't seem to care much about it. There are some issues with Barbara wondering who her wedding date will be, which groomsmen might be single, and which neighborhood boy she might marry when she's her sister's age. But these crushes aren't really explored like Cleary did in previous books, so the focus is mostly on wedding preparation.
That wedding spotlight made this book a bit lackluster for me because it felt very surface-level, and I didn't relate much to any character. That being said, it was an interesting read just to learn about the wedding and shower traditions back then compared to how they are now.