On Kindle:
The Night Circus is on .99
https://www.amazon.com/dp/B005AKFXZW
https://www.amazon.co.uk/dp/B005AKFXZW
and
Hero at the Fall is going for 1.99
https://www.amazon.com/dp/B076CL4SSV
https://www.amazon.co.uk/dp/B076CL4SSV
This one is third in a series of some of the best Fantasy I've read this century. The previous books are Rebel of the Sands and Traitor to the Throne. There's a free sampler at
https://www.amazon.co.uk/Rebel-Sands.../dp/B01NCIP3ER