The Truth (allthetropes.org) The Truth is the 25th Discworld novel and the first standalone since Small Gods.
https://github.com/davepinch/pinchy.cc/blob/master/content/topics/discworld/novels/25-the-truth/the-truth.md
The Truth (novel) (Wikipedia) The Truth is a fantasy novel by the British writer Terry Pratchett, the 25th book in his Discworld series, published in 2000.