I’m looking for a hardcover illustrated children’s book that I remember as having some of the most gorgeous illustrations I’ve ever seen. It’s not a novel, it’s more of a picture book. It has very little plot to it, and is more about describing sights and sounds than about a plot. It’s about a princess that goes to a ball (it could be a masquerade, I’m not absolutely sure), at or before midnight and dances with a fairy prince (I think she does, anyway). The ball is held outside on the palace grounds and in a garden maze (as far as I remember). I think the book ends at dawn when all the magical creatures dancing there disappear. It might have been written in poetry form. I think the cover had an illustration of the princess walking down a flight of stairs in a midnight blue dress. I remember the cover itself as being midnight blue, as well as that colour being the main colour of all of the pages. I can’t remember the title. I feel like it had either the word “Midnight” or the word “Mystery” in the title. I remember the clothing pictured as being 18th century-type and there were lots of peacocks and peacock type colours on several of the pages. The book was most probably published somewhere between the late 80s and mid 90s. I’m hoping someone will be able to help me with this. I only wish I could remember more. The illustrations themselves were reminiscent of the work of Graeme Base.