Here's a story set in Aliette de Bodard's 'Dominion of the Fallen' universe:
Children of Thorns, Children of Water is set between two novels - The House of Shattered Wings and The House of Binding Thorns. It was a preorder reward for The House of Binding Thorns, and was then made available for free online in issue 17 of the Uncanny Magazine.
It has now, deservedly in my opinion, been shortlisted for the 2018 Hugo Award.
To whet your appetite for the story, which I strongly recommend you read, I shamelessly nick Aliette's own description of her story:
Dragons, creepy magic, cooking (!).
In a Paris that never was, a city of magicians, alchemists and Fallen angels struggling to recover from a devastating magical war…
Once each year, the House of Hawthorn tests the Houseless: for those chosen, success means the difference between a safe life and the devastation of the streets. However, for Thuan and his friend Kim Cuc, — dragons in human shapes and envoys from the dying underwater kingdom of the Seine — the stakes are entirely different. Charged with infiltrating a House that keeps encroaching on the Seine, if they are caught, they face a painful death.
Worse, mysterious children of thorns stalk the candidates through Hawthorn’s corridors. Will Thuan and Kim Cuc survive and succeed?
Links: Aliette de Bodard - Children of Thorns, Children of Water - Uncanny Magazine - Hugo Award Shortlist