Game Changer by Rachel Reid

The book that started it all!   Rachel Reid's beloved Game Changers series starts here, with a secret-relationship romance set in the world of professional hockey.
 
New York Admirals captain Scott Hunter takes his pregame rituals very seriously. When a particular smoothie precedes Scott's breaking his on-ice slump, he’s desperate to recreate the magic…and to get to know the sexy, funny guy behind the counter.

Kip Grady knew there was more to Scott’s frequent visits than blended fruit, but he never let himself imagine being invited back to Scott’s penthouse. Or kissed with reckless abandon—and more. What goes on between them is hot, incredible and frequent…but also only on Scott’s terms and always behind his closed apartment doors.

Scott needs Kip in his life, but with playoff season approaching, the spotlight on him is suddenly brighter than ever. He can’t afford to do anything that might derail his career or the public’s image of what a hockey captain should be. Kip is ready to go all in with Scott—but how much longer will he have to remain a secret?
 
Game Changers 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