I know what you mean, but there is a reasonable distinction to be made especially for living persons. An "authorized" biography would be something like what Isa

I know what you mean, but there is a reasonable distinction to be made especially for living persons. An "authorized" biography would be something like what Isaacson does, where they get exclusive access, anecdotes, and importantly confirmation or denial of certain facts or stories. An "unauthorized" biography is not necessarily suspect but it is kind of a subgenre. Consider the difference between Isaacson's Musk biography and the work done by Kate and Ryan for Character Limit (https://www.amazon.com/Character-Limit-Elon-Destroyed-Twitter/dp/059365613X https://www.amazon.com/Character-Limit-Elon-Destroyed-Twitte...) - not exactly a biography but the legwork is fundamentally different, reportorial or even adversarial where the narrative gets challenged, as opposed to accepted by the "authorized" Isaacson.