Qualifications for writing a philosophy book?

if it's not fiction, it's non-fiction. non-fiction book published, have have publishers call "platform" - basically, why read book on subject written you, specifically, rather of existing books on same subject. need sort of expert on subject, preferably recognised such other experts.

books on heavy academic subjects tend written people "doctor" or "professor" in front of names, assume need @ least doctorate in philosophy able publish book it.

edit: well, "the secret"? there may grey area between fiction , non-fiction, judging wikipedia summary, book long way it. if doesn't have plot , characters, it's not fiction. whether fiction or non-fiction has nothing whether it's true. can have fiction based on real events , real people, , can have non-fiction that's lies start finish, "chariots of gods" and, well, "the secret."

do publishers want qualifications writing philosophy? it's not non-fiction, more speculation.

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