href="https://discworld.fandom.com/wiki/Tiffany_Aching" rel="noopener noreferrer">Tiffany Aching. It is the 38th in the Discworld series and was published in Britain on September 2, 2010. The title is based upon the popular poem "
When I Am an Old Woman I Shall Wear Purple" by Jenny Joseph (the correct title for this poem is "
Warning") but beyond the title there is no other to link the two works. The title is also a summary of Tiffany's beliefs and values in regards to her wearing colorful clothing throughout her career as a witch, when Boffo would expect her to wear black. The title line is referenced regularly in the series, as well as in Pratchett's
The Art of Discworld. At the end of
A Hat Full of Sky, when she is regarding the cloak that the hiver bought while possessing her Pratchett says, "When I'm old I shall wear midnight", she'd decided. "But for now she'd had enough of darkness."