The mining of le Carré has been some time in the making: Silverview already uncharacteristically brief and ‘completed’ by his son, the Sisman biography coming out with a previously unauthorised Part II: The Juicy Chapters; the memoir of a former affair; the letters. I’d say it even reaches back to Agent Running in the Field - somewhat shallow and with a pale version of Slough House - and A Legacy of Spies, which was unbridgeable with any realistic timeline and depicted entirely different versions of characters who had escaped retconning for the best part of 50 years.
Most of this is still enormously readable, interesting and stands out from the fray of the literary output of the genre. But le Carré is a brand that’s far too valuable to be left alone. So here we go, a Smiley - The Missing Years and a Leamas Begins and possibly also a Little Drummer Woman with an older Charlie and a Day Manager with Jonathan Pine hunting down Roper…