There are several fairy tale related books on sale as Kindle Daily Deals which are probably price matched with other sellers today, too. There haven't been many sales in the last several months, but today makes up for it with a lot of recent releases for at least half off.
Six Crimson Cranes by Elizabeth Lim which is a Six Swans retelling
A Wolf for a Spell by Karah Sutton has Baba Yaga in it
Comfort Me With Apples by Catherynne M. Valente which has Bluebeard as inspiration
Malice: A Novel by Heather Walter is inspired by Sleeping Beauty
Once Upon a Broken Heart by Stephanie Garber has nods to Tricksters (Jacks) tropes
There's also Holly Black's How the King of Elfhame Learned to Hate Stories and well, just check out the entire list at Kindle Daily Deals.
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