Spufford has done a Narnia sequel
The award-winning writer Francis Spufford has spent three years on a new novel for the CS Lewis Chronicles of Narnia series despite not having permission from the Lewis estate….
Spufford, who has printed 75 copies and distributed them free to friends and fellow writers, said it was “not intended to get out into the world unless, long shot, I come to terms with the estate”.
The Lewis estate has resisted all entreaties to continue the Narnia novels, the last of which was published in 1956 by Lewis, who died in 1963. His work remains in copyright until 2034.
In part he did the sequel for his daughter. Here is the (London) Times link, gated. This guy has tweeted some of the work.