All of Ilona Andrews' Hidden Legacy books (Nevada's and Catalina's and the novella) are £1.99 at Kindle UK right now, and
White Hot is even better at only £0.99. Most of them look as if they've been on sale for a while, but I just noticed while on my way to looking for something else...
And they are NOT on sale in the US, priced at $6.99 and up, mostly up, except the novella...
link to the series webpage at Kindle UK:
https://www.amazon.co.uk/dp/B07FKKSD...kindle_edition
link to the novella,
Diamond Fire:
https://www.amazon.co.uk/dp/B07BK3M7V7