Kings of Sin Series Books 1 - 4 Set (King of Wrath, King of Pride, King of Greed, King of Sloth) Paperback by Ana Huang

Steamy billionaire romances themed around the seven deadly sins
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King of Wrath 
An arranged marriage billionaire romance standalone

King of Pride:
A diverse and steamy, forbidden billionaire romance 

King of Greed:
He had her, he lost her…and he'll do anything to win her back.

King of Sloth:
He'd never wanted anyone enough to chase them...until he met her