The order of the Billion Series was: 1 "Buy one, get one free for a billion wives" "The CEO's Billion Sweetheart" 3 "Genius Girl's Love Game" 4."Wealthy Family: Abandoned Wife Remarried" 5."Reborn Female Supporting Character's Counterattack" 6 "The Devil Young Master's Bed Warmer" The Secret of a Gorgeous Beauty The Abandoned Wife of a Business Tycoon 9 "The Strongest CEO's Useless Wife" [Wealthy Family: The Useless Young Master's Bride] The Billionaire novel series was a famous story about a modern girl who was reborn into ancient times to complete what she had not done in modern times.