I very much hope they don't. Purely personal opinion, but I find carry-it-on authors attempts I've read trite, and bad. Nobody could do Christie, or Sayers.

I had some hope a belief that Lynn Pratchett had been collaborating with Terry might mean she carried on, and I see that as a distinction with meaning: there could be a continuity of witticisms.

But overall, I think this is a bad idea. Cornwall (his real name) was damaged goods from a highly distorted childhood, and exposed aspects of his own frailties in the books by inversion: his many eponymous heroes Smiley included suffer the fate of mistakes in relationships made by women, he was a serial filanderer himself.

How could we expect another author to carry on the evasive, self denying complex moral frauds without the qualifications of experience?

This is a silly naieve idea to make money. To cap it all, the son did not want (sir) Gary Oldman to make more films because he didn't like his characterisation. I watched the Alec Guinness bbc series, the Richard Burton film of "the spy who came in from the cold" and read all the books, biography included. And the wonderfully dingy, sad, thatcherist britain of the new one. Oldman and the entire cast, music, colour grading, set dressing, it all was perfect.