I read an interview with Vernon Vinge where he said he had this whole story arc with Ravna planned out that he expected to take five books in total. It’s been

I read an interview with Vernon Vinge where he said he had this whole story arc with Ravna planned out that he expected to take five books in total. It’s been 10 years since the last Zones of Thought book… Although, it was longer than that between book two and book three.