I was introduced to her works in middle school via the Chrestomanci series, which I think is her most popular? but I didn't like them especially much. I moved on to her more stand-alone novels and fell in love with the the witty humor and heartwarming characterization of Howl's Moving Castle. I really loved the characters and went on to read the sequel as well as the threequel when it came out more recently (by then I was graduating high school).

I also came to appreciate her on a whole different level when she let Miyazaki create his interpretation of her novel.