A brand-new novel tie-in for the popular Elementary TV series. A summons to a body found riddled with bullets in a Hell's Kitchen apartment is the start of a new case for Sherlock Holmes and Joan Watson. The victim is a subway train driver with a strange Colombian connection and a mysterious pile of money, but who would want to kill him? The search for the truth will lead the detectives into the hidden underground tunnels of New York City, where more bodies may well await them.