Books series - "Mafia's love"

Kathleen is a simple, beautiful girl who always dreams high. She has a tender heart and always helps people. Ryan is a devilishly handsome mafia leader. Just a simple look of him can make everyone scare and bow to him. She is a creator… He is a destroyer. She holds pen… He holds gun. She is light… He is allured by darkness. What possibly could happen when a billionaire mafia man loves Kathleen and enters into her simple life?