https://www.penguinrandomhouse.com/books/133534/the-science-of-discworld-by-terry-pratchett-with-ian-stewart-and-jack-cohen/
The Science of Discworld by Terry Pratchett, Ian Stewart, Jack Cohen: 9780804168946 |...
Not just another science book and not just another Discworld novella, The Science of Discworld is a creative, mind-bending mash-up of fiction...
the science of discworldby terry