The Game Is On (Book 2 in the Abby Watson series/Sherlock fanfic)

After two years of dating, Sherlock Holmes and Abigail Watson still have their fairly strange relationship, unbeknownst to Abigail's brother, John. After John and Sherlock meet and move in together, the three start a crime solving trio that's a force to be wrecking with. But what happens when some unknown man decides...