Hero in Waiting (Heroes Inc. #1)
Andrew Grey

Miller Washington served with Wells, and the two men shared an attraction that neither of them acknowledged. When Miller learns that an old enemy is on the loose and that he may come after Wells, he makes a beeline to help. But he doesn’t expect repressed desire to blaze back to life.
Between renewed attraction and an enemy who will stop at nothing to get even, Wells and Miller must navigate the heat of passion too strong for either of them to contain while not letting their guard down, in order to protect Wells’s family and their second chance.