Here's something that might apply in some cases: a group of writers might well be capable of producing a better fiction book than a single writer but probably t

Here's something that might apply in some cases: a group of writers might well be capable of producing a better fiction book than a single writer but probably the process would be less efficient: with all the discussions, three writers might take longer to produce a book than one writer would. TV and cinema have big enough budgets to justify the increased cost, but books don't.