A Blink of the Screen by Terry Pratchett, his collected short fiction, is just £1.99 at Amazon UK today as part of Amazon's daily deal. It's £3.99 at Kobo, but it should be possible to price match it, in which case it'll be £1.79 (1.99*0.9).
https://www.amazon.co.uk/Blink-Scree...dp/B008K4JKJK/
https://www.kobo.com/gb/en/ebook/a-b...c-70113eaf0da4