The Joye of Snacks
A cookery book, published by Goatberger in Ankh-Morpork where many dangerous things originate. Attributed to a Witch of Lancre, it was later discovered to be a collection of the accumulated culinary wisdom of one Nanny Ogg. You have been warned.
Only incidentally about the culinary arts, this is one part cookery book and three parts grimoire, on a par with certain things kept under crushed ice in the cellars of the Library at Unseen University. No doubt, if the Librarian has received a courtesy copy, he will have repeated the word "Ooook!" many times, and determined that this is too dangerous to go on publicly accessible shelving.
A less dangerous version using only mundane ingredients and the sort of things Lancre witches would scorn to describe as "herbs" has been released in Roundworld under the title of Nanny Ogg's Cookbook. While this has the same relationship to the original that Woddeley's Occult Primer has to the Necrotelicomnicon, the recipes do work and there are interesting discursions into the mind and philosophy of Gytha Ogg.
Older readers may recall The Joy of Sex by Dr Alan Comfort, an operator's manual for genitalia considered risqué in 1972. Wikipedia notes that "A pocket book version entitled, The Joy of Sex, the Pocket Edition was also published. The book won the Bookseller/Diagram Prize for Oddest Title of the Year in 1997."