Possible Clues:

• The Animals hit, oddly overlooked, turned into a book
• Is first class expression of understanding by prophet
• Bible book after Song of Solomon
• Book is perfect, I see!
• Book this writer has tipped — it's about perfect
• Major prophet
• Pronounced views anger Old Testament prophet
• Name meaning 'God is salvation'
• 'Swords into plowshares' source
• "Swords into plowshares" source