I powered up a new PC earlier, and as is my wont, brought up the BBC News webpage to test the browser and networking, and this came up as Breaking News.
I started reading many of his books, too many years back, and used to occasionally see replies from him in threads that I was participating in, on the alt.fan.pratchett newsgroup. Even then, not many authors participated in newsgroups discussing their work, but he did, and was excellent and amusing.
It was horrible when Iain M Banks passed on a couple of years back, but this is worse. As others have said, not entirely unexpected, but not something I wanted to see, nevertheless.
AT LAST, SIR TERRY, WE MUST WALK TOGETHER.