Velmans and Jones
Velmans and Jones are a publishing house based at Runecaster Way in Ankh-Morpork. It is very possible that where Goatberger and Cropper are renowned in publishing for a series of continual abject spectacular disasters, this company has been quietly and inobtrusively getting it right. Their author list includes Felicity Beedle, the famous authoress of books that the kids really want to read, and the prolific Iradne Comb-Buttworthy. This company also publishes mapps and guidebooks, and may even be the in-universe publisher of The Compleat Ankh-Morpork. They are certainly credited with The World of Poo..