Tyler Jamison Series by April Wilson

In this second installment in the Tyler Jamison and Ian Alexander romantic suspense series, Tyler and Ian face their greatest challenge yet. Homicide detective Tyler Jamison is facing the unthinkable -- a prison sentence for beating the man who assaulted Ian. But that's only the beginning of their troubles, because when Ian's younger sister goes missing, Tyler risks everything to save the sister of the man he loves.

Tyler and Ian are embarking on their new venture as private investigators. After they solve their first case, they celebrate by taking a road trip to Key West. Their objective: fun and relaxation in the sun. Unfortunately, fate has something else in store for them. When a guest at the hotel where they're staying goes missing, they can't just sit by and do nothing.