The Amazon Autumn Sale includes the following (oddly the link on the Daily Deal page has been replaced by a link for the Super Thursday sale...)
Sea of Rust, by C Robert Cargill is 99p
https://www.amazon.co.uk/Sea-Rust-C-...ds=sea+of+rust
The Horse Lord, by Peter Morwood (
The Book of Years 1) is 99p
https://www.amazon.co.uk/Horse-Lord-...8541173&sr=1-3
REPEAT
The Darkest Part of the Forest, by Holly Black is 99p
https://www.amazon.co.uk/Darkest-Par...541202&sr=1-28
Complete, by Vera Nazarian (
The Atlantis Grail book 2) is 99p
https://www.amazon.co.uk/Compete-Atl...541230&sr=1-34
Authority, by Jeff Vandermeer (
The Southern Reach book 2) is £1.99
https://www.amazon.co.uk/Authority-S...541230&sr=1-33
REPEAT
The Midnight, Texas series by Charlaine Harris are 99p each:
https://www.amazon.co.uk/s/ref=sr_in...rnid=535007031
Midnight Crossroad
Day Shift
Night Shift
REPEAT
The House with a Clock in It's Walls, by John Bellairs is 99p
https://www.amazon.co.uk/House-Clock...:John+Bellairs