This is such a brilliant book. There are clever puns, reinterpretations of common phrases into living beings, and vocabulary on par with a high school literature class. September's second adventure to Fairyland takes place beneath its surface as she tries to right events that have occurred since her last visit. Along the way she makes many new friends including an entire branch of nobles that are named for teas and coffees. There's also a school of study of questing magicks that invoke mathematical principles, and (in one of my favorite scenes) a scientist who insists on using metric for measuring because "it is the only way to get accurate measurements". There is whimsy, mixed with sadness, mixed with growing up. This should be read by everyone, from children to adults, preferably several times and at different stages of life.