Thinking back on this twenty years on, it seems insane! Who puts out so many books in a line in 2022? And somehow I kept up with them!Pocket [...] were up to 24 per year during Voyager's run. They didn't start to decrease their output again until after Enterprise ended.
My understanding (this is based on a fuzzy memory of a DWM article from ~2006) is that it was a financial decision based on how well they sell. Why should BBC Books spend x on a book and make x + y, when they could spend x and make (say) x + 3y, tripling their profit for the same upfront costs? Of course, these days we don't get new series novels, either!That's a bit of a story. When Doctor Who returned to TV, they had to stop publishing novels based on the Classic Doctors at request of then showrunner Russell T Davies and focus strictly on tie-ins for the current Doctor. Over the years, tie-ins for the incumbent Doctors have become increasingly fleeting due to successive showrunners Steven Moffat and Chris Chibnall not being particularly enamored with the novel lines and not signing off on approvals on them as a result.