The second book of  series is Heated Rivalry.  This steamy book by Rachel Reid follows the characters Shane Hollander and Ilya Rozanov.  A steamy read and a beautiful love story. 
Book Series: 
Book 1: Game Changer
Book 2: Heated Rivalry
Book 3: Tough Guy
Book 4: Common Goal
Book 5: Role Model
Book 6: The Long Game
Book 7: Unrivaled