Elder Race begins as a classic fantasy story with a young princess out on a quest to prove herself by going to get the reclusive of a sorcerer to come fight the demon hurting her people. However, this is Tchaikovsky, so nothing is quite as it seems.
If a different kind of fantasy story mixed with science intrigues you, I highly recommend picking this up. Well written, good characters and filled with interesting ideas and developments, this is a great novella.