Hope Mirrlees' Lud-in-the-Mist, published in 1926, was well worth reading: unusual, thought-provoking, and beautifully written, including a wonderful literal description of a sunrise (at the end of chapter 20).
The book concerns the people of Dorimare (the title is the capital city) and their struggle with the effects of fruit smuggled from Fairyland, just to the west of Dorimare, which banned everything to do with Fairy centuries before. In particular, Nathaniel Chanticleer struggles to help his son, who has eaten Fairy Fruit, and to solve a very cold murder case.
I had a few problems with the book (including a major complaint towards the end) but on the whole it was delightful.