Given the following reasoning and answer, what was the question? The relevant information is: In Judaism and Christianity, its authorship is attributed to a prophet who lived in the Assyrian Period and named himself in the first verse, Obadiah.
The answer: Obadiah
The question Passage: In Judaism and Christianity, its authorship is attributed to a prophet who lived in the Assyrian Period and named himself in the first verse, Obadiah. His name means "servant of Yahweh".

Question: Based on this passage, who wrote the book of obadiah in the bible?